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1. Level structures of Ca cast doubt on a doubly magic Ca

Author

Chen, S., Browne, F., Doornenbal, P., Lee, J., Obertelli, A., Tsunoda, Y., Otsuka, T., Chazono, Y., Hagen, G., Holt, J.D., Jansen, G.R., Ogata, K., Shimizu, N., Utsuno, Y., Yoshida, K., Achouri, N.L., Baba, H., Calvet, D., Château, F., Chiga, N., Corsi, A., Cortés, M.L., Delbart, A., Gheller, J.M., Giganon, A., Gillibert, A., Hilaire, C., Isobe, T., Kobayashi, T., Kubota, Y., Lapoux, V., Liu, H.N., Motobayashi, T., Murray, I., Otsu, H., Panin, V., Paul, N., Rodriguez, W., Sakurai, H., Sasano, M., Steppenbeck, D., Stuhl, L., Sun, Y.L., Togano, Y., Uesaka, T., Wimmer, K., Yoneda, K., Aktas, O., Aumann, T., Chung, L.X., Flavigny, F., Franchoo, S., Gasparic, I., Gerst, R.B., Gibelin, J., Hahn, K.I., Kim, D., Koiwai, T., Kondo, Y., Koseoglou, P., Lehr, C., Linh, B.D., Lokotko, T., MacCormick, M., Moschner, K., Nakamura, T., Park, S.Y., Rossi, D., Sahin, E., Söderström, P.A., Sohler, D., Takeuchi, S., Törnqvist, H., Vaquero, V., Wagner, V., Wang, S., Werner, V., Xu, X., Yamada, H., Yan, D., Yang, Z., Yasuda, M., and Zanetti, L.

Abstract

Gamma decays were observed in $^{56}$Ca and $^{58}$Ca following quasi-free one-proton knockout reactions from $^{57,59}$Sc beams at ≈200 MeV/nucleon. For $^{56}$Ca, a γ ray transition was measured to be 1456(12) keV, while for $^{58}$Ca an indication for a transition was observed at 1115(34) keV. Both transitions were tentatively assigned as the 21+→0gs+ decays, and were compared to results from ab initio and conventional shell-model approaches. A shell-model calculation in a wide model space with a marginally modified effective nucleon-nucleon interaction depicts excellent agreement with experiment for 21+ level energies, two-neutron separation energies, and reaction cross sections, corroborating the formation of a new nuclear shell above the N = 34 shell. Its constituents, the 0f5/2 and 0g9/2 orbitals, are almost degenerate. This degeneracy precludes the possibility for a doubly magic $^{60}$Ca and potentially drives the dripline of Ca isotopes to $^{70}$Ca or even beyond.

Published
2023

2. High-spin states in Po above the -decaying (18 ) Isomer

Author

Zago, L., Gottardo, A., Valiente-Dobón, J.J., Benzoni, G., Gadea, A., Górska, M., Lunardi, S., Podolyák, Zs., Regan, P.H., Rudolph, D., Algora, A., de Angelis, G., Bazzacco, D., Benlliure, J., Boutachkov, P., Bracco, A., Bruce, A.M., Camera, F., Casarejos, E., Cortés, M.L., Crespi, F.C.L., Corsi, A., Domingo-Pardo, C., Doncel, M., Engert, T., Geissel, H., Gerl, J., Goasduff, A., Goel, N., Grebosz, J., Gregor, E., Habermann, T., Klupp, S., Kojouharov, I., Kurz, N., Lenzi, S.M., Leoni, S., Mandal, S., Menegazzo, R., Mengoni, D., Million, B., Morales, A.I., Napoli, D.R., Naqvi, F., Nociforo, C., Pfützner, M., Pietri, S., Prochazka, A., Recchia, F., Sahin, E., Schaffner, H., Sharma, A., Sitar, B., Siwal, D., Strmen, P., Szarka, I., Ur, C.A., Walker, P.M., Weick, H., Wieland, O., and Wollersheim, H.J.

Abstract

The nucleus $^{212}$Po has been produced through the fragmentation of a $^{238}$U primary beam at 1 GeV/nucleon at GSI, separated with the FRagment Separator, FRS, and studied via isomer γ-decay spectroscopy with the RISING setup. Two delayed previously unknown γ rays have been observed. One has been attributed to the E3 decay of a 21$^{−}$ isomeric state feeding the α-emitting 45-s (18$^{+}$) high-spin isomer. The other γ-ray line has been assigned to the decay of a higher-lying 23$^{+}$ metastable state. These are the first observations of high-spin states above the $^{212}$Po (18$^{+}$) isomer, by virtue of the selectivity obtained via ion-by-ion identification of $^{238}$U fragmentation products. Comparison with shell-model calculations points to shortfalls in the nuclear interactions involving high-j proton and neutron orbitals, to which the region around Z∼100 is sensitive.

Published
2022

3. A first glimpse at the shell structure beyond Ca-54: Spectroscopy of K-55, Ca-55, and Ca-57

Author

Koiwai, T, Wimmer, K, Doornenbal, P, Obertelli, A, Barbieri, C, Duguet, T, Holt, JD, Miyagi, T, Navratil, P, Ogata, K, Shimizu, N, Soma, V, Utsuno, Y, Yoshida, K, Achouri, NL, Baba, H, Browne, F, Calvet, D, Chateau, F, Chen, S, Chiga, N, Corsi, A, Cortes, ML, Delbart, A, Gheller, J-M, Giganon, A, Gillibert, A, Hilaire, C, Isobe, T, Kobayashi, T, Kubota, Y, Lapoux, V, Liu, HN, Motobayashi, T, Murray, I, Otsu, H, Panin, V, Paul, N, Rodriguez, W, Sakurai, H, Sasano, M, Steppenbeck, D, Stuhl, L, Sun, YL, Togano, Y, Uesaka, T, Yoneda, K, Aktas, O, Aumann, T, Chung, LX, Flavigny, F, Franchoo, S, Gasparic, I, Gerst, R-B, Gibelin, J, Hahn, K, Kim, D, Kondo, Y, Koseoglou, P, Lee, J, Lehr, C, Linh, BD, Lokotko, T, MacCormick, M, Moschner, K, Nakamura, T, Park, SY, Rossi, D, Sahin, E, Soderstrom, P-A, Sohler, D, Takeuchi, S, Toernqvist, H, Vaquero, V, Wagner, V, Wang, S, Werner, V, Xu, X, Yamada, H, Yan, D, Yang, Z, Yasuda, M, and Zanetti, L

Subjects
MODEL, Science & Technology, Physics, Nuclear, gamma-ray spectroscopy, Physics, Physical Sciences, SCATTERING, Shell evolution, Astronomy & Astrophysics, MASSES, Physics, Particles & Fields, Radioactive beams
Abstract

ispartof: PHYSICS LETTERS B vol:827 status: published

Published
2022

4. A first glimpse at the shell structure beyond Ca-54: Spectroscopy of K-55, Ca-55, and Ca-57

Author

Koiwai, T., Wimmer, K., Doornenbal, P., Obertelli, A., Barbieri, C., Duguet, T., Holt, J. D., Miyagi, T., Navratil, P., Ogata, K., Shimizu, N., Soma, V, Utsuno, Y., Yoshida, K., Achouri, N. L., Baba, H., Browne, F., Calvet, D., Chateau, F., Chen, S., Chiga, N., Corsi, A., Cortes, M. L., Delbart, A., Gheller, J-M, Giganon, A., Gillibert, A., Hilaire, C., Isobe, T., Kobayashi, T., Kubota, Y., Lapoux, V, Liu, H. N., Motobayashi, T., Murray, I, Otsu, H., Panin, V, Paul, N., Rodriguez, W., Sakurai, H., Sasano, M., Steppenbeck, D., Stuhl, L., Sun, Y. L., Togano, Y., Uesaka, T., Yoneda, K., Aktas, O., Aumann, T., Chung, L. X., Flavigny, F., Franchoo, S., Gasparic, I, Gerst, R-B, Gibelin, J., Hahn, K., I, Kim, D., Kondo, Y., Koseoglou, P., Lee, J., Lehr, C., Linh, B. D., Lokotko, T., MacCormick, M., Moschner, K., Nakamura, T., Park, S. Y., Rossi, D., Sahin, E., Soderstrom, P-A, Sohler, D., Takeuchi, S., Toernqvist, H., Vaquero, V., Wagner, V, Wang, S., Werner, V, Xu, X., Yamada, H., Yan, D., Yang, Z., Yasuda, M., Zanetti, L., Koiwai, T., Wimmer, K., Doornenbal, P., Obertelli, A., Barbieri, C., Duguet, T., Holt, J. D., Miyagi, T., Navratil, P., Ogata, K., Shimizu, N., Soma, V, Utsuno, Y., Yoshida, K., Achouri, N. L., Baba, H., Browne, F., Calvet, D., Chateau, F., Chen, S., Chiga, N., Corsi, A., Cortes, M. L., Delbart, A., Gheller, J-M, Giganon, A., Gillibert, A., Hilaire, C., Isobe, T., Kobayashi, T., Kubota, Y., Lapoux, V, Liu, H. N., Motobayashi, T., Murray, I, Otsu, H., Panin, V, Paul, N., Rodriguez, W., Sakurai, H., Sasano, M., Steppenbeck, D., Stuhl, L., Sun, Y. L., Togano, Y., Uesaka, T., Yoneda, K., Aktas, O., Aumann, T., Chung, L. X., Flavigny, F., Franchoo, S., Gasparic, I, Gerst, R-B, Gibelin, J., Hahn, K., I, Kim, D., Kondo, Y., Koseoglou, P., Lee, J., Lehr, C., Linh, B. D., Lokotko, T., MacCormick, M., Moschner, K., Nakamura, T., Park, S. Y., Rossi, D., Sahin, E., Soderstrom, P-A, Sohler, D., Takeuchi, S., Toernqvist, H., Vaquero, V., Wagner, V, Wang, S., Werner, V, Xu, X., Yamada, H., Yan, D., Yang, Z., Yasuda, M., and Zanetti, L.

Abstract

States in the N = 35 and 37 isotopes Ca-55,Ca-57 have been populated by direct proton-induced nucleon removal reactions from Sc-56,Sc-58 and Ca-56 beams at the RIBF. In addition, the (p, 2p) quasi-free single-proton removal reaction from Ca-56 was studied. Excited states in K-55, Ca-55, and Ca-57 were established for the first time via in-beam gamma-ray spectroscopy. Results for the proton and neutron removal reactions from Ca-56 to states in K-55 and Ca-55 for the level energies, excited state lifetimes, and exclusive cross sections agree well with state-of-the-art theoretical calculations using different approaches. The observation of a short-lived state in Ca-57 suggests a transition in the calcium isotopic chain from single-particle dominated states at N = 35 to collective excitations at N = 37. (c) 2022 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP(3).

Published
2022

5. High-spin states in Po-212 above the alpha-decaying (18(+)) isomer

Author

Zago, L., Gottardo, A., Valiente-Dobon, J. J., Benzoni, G., Gadea, A., Gorska, M., Lunardi, S., Podolyak, Zs., Regan, P. H., Rudolph, D., Algora, A., de Angelis, G., Bazzacco, D., Benlliure, J., Boutachkov, R., Bracco, A., Bruce, A. M., Camera, F., Casarejos, E., Cortes, M. L., Crespi, F. C. L., Corsi, A., Domingo-Pardo, C., Doncel, M., Engert, T., Geissel, H., Gerl, J., Goasduff, A., Goel, N., Grebosz, J., Gregor, E., Habermann, T., Klupp, S., Kojouharov, I., Kurz, N., Lenzi, S. M., Leoni, S., Mandal, S., Menegazzo, R., Mengoni, D., Million, B., Morales, A. I., Napoli, D. R., Naqvi, F., Nociforo, C., Pfiitzner, M., Pietri, S., Prochazka, A., Recchia, F., Sahin, E., Schaffner, H., Sharma, A., Sitar, B., Siwal, D., Strmen, R., Szarka, I., Ur, C. A., Walker, P. M., Weick, H., Wieland, O., Wollersheime, H. -J., Zago, L., Gottardo, A., Valiente-Dobon, J. J., Benzoni, G., Gadea, A., Gorska, M., Lunardi, S., Podolyak, Zs., Regan, P. H., Rudolph, D., Algora, A., de Angelis, G., Bazzacco, D., Benlliure, J., Boutachkov, R., Bracco, A., Bruce, A. M., Camera, F., Casarejos, E., Cortes, M. L., Crespi, F. C. L., Corsi, A., Domingo-Pardo, C., Doncel, M., Engert, T., Geissel, H., Gerl, J., Goasduff, A., Goel, N., Grebosz, J., Gregor, E., Habermann, T., Klupp, S., Kojouharov, I., Kurz, N., Lenzi, S. M., Leoni, S., Mandal, S., Menegazzo, R., Mengoni, D., Million, B., Morales, A. I., Napoli, D. R., Naqvi, F., Nociforo, C., Pfiitzner, M., Pietri, S., Prochazka, A., Recchia, F., Sahin, E., Schaffner, H., Sharma, A., Sitar, B., Siwal, D., Strmen, R., Szarka, I., Ur, C. A., Walker, P. M., Weick, H., Wieland, O., and Wollersheime, H. -J.

Abstract

The nucleus Po-212 has been produced through the fragmentation of a U-238 primary beam at 1GeV/nucleon at GSI, separated with the FRagment Separator, FRS, and studied via isomer gamma-decay spectroscopy with the RISING setup. Two delayed previously unknown gamma rays have been observed. One has been attributed to the E3 decay of a 21(-) isomeric state feeding the alpha-emitting 45-s (18(+)) high-spin isomer. The other gamma-ray line has been assigned to the decay of a higher-lying 23(+) metastable state. These are the first observations of high-spin states above the Po-212 (18(+)) isomer, by virtue of the selectivity obtained via ion-by-ion identification of U-238 fragmentation products. Comparison with shell-model calculations points to shortfalls in the nuclear interactions involving high- jproton and neutron orbitals, to which the region around Z similar to 100 is sensitive. (C) 2022 The Authors. Published by Elsevier B.V.

Published
2022

6. High-spin states in Po-212 above the alpha-decaying (18+) isomer

Author

Zago, L, Gottardo, A, Valiente-Dobon, Jj, Benzoni, G, Gadea, A, Gorska, M, Lunardi, S, Podolyak, Z, Regan, Ph, Rudolph, D, Algora, A, de Angelis, G, Bazzacco, D, Benlliure, J, Boutachkov, R, Bracco, A, Bruce, Am, Camera, F, Casarejos, E, Cortes, Ml, Crespi, Fcl, Corsi, A, Domingo-Pardo, C, Doncel, M, Engert, T, Geissel, H, Gerl, J, Goasduff, A, Goel, N, Grebosz, J, Gregor, E, Habermann, T, Klupp, S, Kojouharov, I, Kurz, N, Lenzi, Sm, Leoni, S, Mandal, S, Menegazzo, R, Mengoni, D, Million, B, Morales, Ai, Napoli, Dr, Naqvi, F, Nociforo, C, Pfiitzner, M, Pietri, S, Prochazka, A, Recchia, F, Sahin, E, Schaffner, H, Sharma, A, Sitar, B, Siwal, D, Strmen, R, Szarka, I, Ca, Ur, Walker, Pm, Weick, H, Wieland, O, and Wollersheime, Hj

Subjects
High-spin spectroscopy, gamma spectroscopy, Isomer spectroscopy
Published
2022

7. Transition probabilities in P and S: A test for isospin symmetry

Author

Tonev, D., de Angelis, G., Deloncle, I., Goutev, N., De Gregorio, G., Pavlov, P., Pantaleev, I.L., Iliev, S., Yavahchova, M.S., Bizzeti, P.G., Demerdjiev, A., Dimitrov, D.T., Farnea, E., Gadea, A., Geleva, E., He, C.Y., Laftchiev, H., Lenzi, S.M., Lunardi, S., Marginean, N., Menegazzo, R., Napoli, D.R., Nowacki, F., Orlandi, R., Penttilä, H., Recchia, F., Sahin, E., Singh, R.P., Stoyanova, M., Ur, C.A., and Wirth, H.F.

Abstract

Excited states in the mirror nuclei $^{31}$P and $^{31}$S were populated in the 1p and 1n exit channels of the reaction $^{20}$Ne + $^{12}$C, at a beam energy of 33 MeV. The $^{20}$Ne beam was delivered for the first time by the Piave-Alpi accelerator of the Laboratori Nazionali di Legnaro. Angular correlations of coincident γ-rays and Doppler-shift attenuation lifetime measurements were performed using the multi-detector array GASP in conjunction with the EUCLIDES charged particle detector. In the observed B(E1) strengths, the isoscalar component, amounting to 24% of the isovector one, provides strong evidence for breaking of the isospin symmetry in the A=31 mass region. Self-consistent beyond mean field calculations using Equation of Motion method based on a chiral potential and including two- and three-body forces reproduce well the experimental B(E1) strengths, reinforcing our conclusion. Coherent mixing from higher-lying states involving the Giant Isovector Monopole Resonance accounts well for the effect observed. The breaking of the isospin symmetry originates from the violation of the charge symmetry of the two- and three-body parts of the potential, only related to the Coulomb interaction.

Published
2021

8. Manifestation of the Berry phase in the atomic nucleus Pb

Author

Valiente-Dobón, J.J., Gottardo, A., Benzoni, G., Gadea, A., Lunardi, S., Algora, A., de Angelis, G., Bazzacco, D., Benlliure, J., Boutachkov, P., Bracco, A., Bruce, A.M., Camera, F., Casarejos, E., Cortés, M.L., Crespi, F.C.L., Corsi, A., Domingo-Pardo, C., Doncel, M., Engert, T., Geissel, H., Gerl, J., Goasduff, A., Goel, N., Górska, M., Grebosz, J., Gregor, E., Habermann, T., Klupp, S., Kojouharov, I., Kurz, N., Lenzi, S.M., Leoni, S., Mandal, S., Menegazzo, R., Mengoni, D., Million, B., Morales, A.I., Napoli, D.R., Naqvi, F., Nociforo, C., Pfützner, M., Pietri, S., Podolyák, Zs., Prochazka, A., Recchia, F., Regan, P.H., Rudolph, D., Sahin, E., Schaffner, H., Sharma, A., Sitar, B., Siwal, D., Strmen, P., Szarka, I., Ur, C.A., Walker, P.M., Weick, H., Wieland, O., Wollersheim, H.J., and Van Isacker, P.

Abstract

The neutron-rich $^{213}$Pb isotope was produced in the fragmentation of a primary 1 GeV A $^{238}$U beam, separated in FRS in mass and atomic number, and then implanted for isomer decay γ-ray spectroscopy with the RISING setup at GSI. A newly observed isomer and its measured decay properties indicate that states in $^{213}$Pb are characterized by the seniority quantum number that counts the nucleons not in pairs coupled to angular momentum J=0. The conservation of seniority is a consequence of a geometric phase associated with particle-hole conjugation, which becomes observable in semi-magic nuclei where nucleons half-fill the valence shell. The γ-ray spectroscopic observables in $^{213}$Pb are thus found to be driven by two mechanisms, particle-hole conjugation and seniority conservation, which are intertwined through a Berry phase.

Published
2021

9. First spectroscopic study of Ar by the (p,2p) reaction

Author

Juhász, M.M., Elekes, Z., Sohler, D., Utsuno, Y., Yoshida, K., Otsuka, T., Ogata, K., Doornenbal, P., Obertelli, A., Baba, H., Browne, F., Calvet, D., Château, F., Chen, S., Chiga, N., Corsi, A., Cortés, M.L., Delbart, A., Gheller, J.M., Giganon, A., Gillibert, A., Hilaire, C., Isobe, T., Kobayashi, T., Kubota, Y., Lapoux, V., Motobayashi, T., Murray, I., Otsu, H., Panin, V., Paul, N., Rodriguez, W., Sakurai, H., Sasano, M., Steppenbeck, D., Stuhl, L., Sun, Y.L., Togano, Y., Uesaka, T., Wimmer, K., Yoneda, K., Achouri, N.L., Aktas, O., Aumann, T., Chung, L.X., Dombrádi, Zs., Flavigny, F., Franchoo, S., Gašparić, I., Gerst, R.B., Gibelin, J., Hahn, K.I., Kim, D., Koiwai, T., Kondo, Y., Koseoglou, P., Lee, J., Lehr, C., Linh, B.D., Liu, H.N., Lokotko, T., MacCormick, M., Moschner, K., Nakamura, T., Park, S.Y., Rossi, D., Sahin, E., Söderström, P.A., Takeuchi, S., Törnqvist, H., Vaquero, V., Wagner, V., Wang, S., Werner, V., Xu, X., Yamada, H., Yan, D., Yang, Z., Yasuda, M., and Zanetti, L.

Abstract

The nuclear structure of $^{51}$Ar, an uncharted territory so far, was studied by the (p,2p) reaction using γ-ray spectroscopy for the bound states and the invariant mass method for the unbound states. Two peaks were detected in the γ-ray spectrum and six peaks were observed in the $^{50}$Ar+n relative energy spectrum. Comparing the results to our shell-model calculations, two bound and six unbound states were established. Three of the unbound states could only be placed tentatively due to the low number of counts in the relative energy spectrum of events associated with the decay through the first excited state of $^{50}$Ar. The low cross sections populating the two bound states of $^{51}$Ar could be interpreted as a clear signature for the presence of significant subshell closures at neutron numbers 32 and 34 in argon isotopes. It was also revealed that due to the two valence holes, unbound collective states coexist with individual-particle states in $^{51}$Ar.

Published
2021

10. Manifestation of the Berry phase in the atomic nucleus 213Pb

Author

Valiente-Dobón, J.J., Gottardo, A., Benzoni, G., Gadea, A., Lunardi, S., Algora, A., de Angelis, G., Bazzacco, D., Benlliure, J., Boutachkov, P., Bracco, A., Bruce, A.M., Camera, F., Casarejos, E., Cortés, M.L., Crespi, F. C. L., Corsi, A., Domingo-Pardo, C., Doncel, M., Engert, T., Geissel, H., Gerl, J., Goasduff, A., Goel, N., Górska, M., Grebosz, J., Gregor, E., Habermann, T., Klupp, S., Kojouharov, I., Kurz, N., Lenzi, S. M., Leoni, S., Mandal, S., Menegazzo, R., Mengoni, D., Million, B., Morales, A. I., Napoli, D.R., Naqvi, F., Nociforo, C., Pfützner, M., Pietri, S., Podolyák, Zs., Prochazka, A., Recchia, F., Regan, P.H., Rudolph, D., Sahin, E., Schaffner, H., Sharma, A., Sitar, B., Siwal, D., Strmen, P., Szarka, I., Ur, C.A., Walker, P.M., Weick, H., Wieland, O., Wollersheim, H.‐J., Van Isacker, P., Valiente-Dobón, J.J., Gottardo, A., Benzoni, G., Gadea, A., Lunardi, S., Algora, A., de Angelis, G., Bazzacco, D., Benlliure, J., Boutachkov, P., Bracco, A., Bruce, A.M., Camera, F., Casarejos, E., Cortés, M.L., Crespi, F. C. L., Corsi, A., Domingo-Pardo, C., Doncel, M., Engert, T., Geissel, H., Gerl, J., Goasduff, A., Goel, N., Górska, M., Grebosz, J., Gregor, E., Habermann, T., Klupp, S., Kojouharov, I., Kurz, N., Lenzi, S. M., Leoni, S., Mandal, S., Menegazzo, R., Mengoni, D., Million, B., Morales, A. I., Napoli, D.R., Naqvi, F., Nociforo, C., Pfützner, M., Pietri, S., Podolyák, Zs., Prochazka, A., Recchia, F., Regan, P.H., Rudolph, D., Sahin, E., Schaffner, H., Sharma, A., Sitar, B., Siwal, D., Strmen, P., Szarka, I., Ur, C.A., Walker, P.M., Weick, H., Wieland, O., Wollersheim, H.‐J., and Van Isacker, P.

Abstract

The neutron-rich 213Pb isotope was produced in the fragmentation of a primary 1 GeV A 238U beam, separated in FRS in mass and atomic number, and then implanted for isomer decay γ-ray spectroscopy with the RISING setup at GSI. A newly observed isomer and its measured decay properties indicate that states in 213Pb are characterized by the seniority quantum number that counts the nucleons not in pairs coupled to angular momentum J=0. The conservation of seniority is a consequence of a geometric phase associated with particle-hole conjugation, which becomes observable in semi-magic nuclei where nucleons half-fill the valence shell. The γ-ray spectroscopic observables in 213Pb are thus found to be driven by two mechanisms, particle-hole conjugation and seniority conservation, which are intertwined through a Berry phase.

Published
2021

11. First spectroscopic study of( 51)Ar by the (p,2p) reaction

Author

Juhasz, M. M., Elekes, Z., Sohler, D., Utsuno, Y., Yoshida, K., Otsuka, T., Ogata, K., Doornenbal, P., Obertelli, A., Baba, H., Browne, F., Calvet, D., Chateau, F., Chen, S., Chiga, N., Corsi, A., Cortes, M. L., Delbart, A., Gheller, J-M, Giganon, A., Gillibert, A., Hilaire, C., Isobe, T., Kobayashi, T., Kubota, Y., Lapoux, V, Motobayashi, T., Murray, I, Otsu, H., Panin, V, Paul, N., Rodriguez, W., Sakurai, H., Sasano, M., Steppenbeck, D., Stuhl, L., Sun, Y. L., Togano, Y., Uesaka, T., Wimmer, K., Yoneda, K., Achouri, N. L., Aktas, O., Aumann, T., Chung, L. X., Dombradi, Zs, Flavigny, F., Franchoo, S., Gasparic, I, Gerst, R-B, Gibelin, J., Hahn, K., I, Kim, D., Koiwai, T., Kondo, Y., Koseoglou, P., Lee, J., Lehr, C., Linh, B. D., Liu, H. N., Lokotko, T., MacCormick, M., Moschner, K., Nakamura, T., Park, S. Y., Rossi, D., Sahin, E., Soderstrom, P-A, Takeuchi, S., Tornqvist, H., Vaquero, V., Wagner, V, Wang, S., Werner, V, Xu, X., Yamada, H., Yan, D., Yang, Z., Yasuda, M., Zanetti, L., Juhasz, M. M., Elekes, Z., Sohler, D., Utsuno, Y., Yoshida, K., Otsuka, T., Ogata, K., Doornenbal, P., Obertelli, A., Baba, H., Browne, F., Calvet, D., Chateau, F., Chen, S., Chiga, N., Corsi, A., Cortes, M. L., Delbart, A., Gheller, J-M, Giganon, A., Gillibert, A., Hilaire, C., Isobe, T., Kobayashi, T., Kubota, Y., Lapoux, V, Motobayashi, T., Murray, I, Otsu, H., Panin, V, Paul, N., Rodriguez, W., Sakurai, H., Sasano, M., Steppenbeck, D., Stuhl, L., Sun, Y. L., Togano, Y., Uesaka, T., Wimmer, K., Yoneda, K., Achouri, N. L., Aktas, O., Aumann, T., Chung, L. X., Dombradi, Zs, Flavigny, F., Franchoo, S., Gasparic, I, Gerst, R-B, Gibelin, J., Hahn, K., I, Kim, D., Koiwai, T., Kondo, Y., Koseoglou, P., Lee, J., Lehr, C., Linh, B. D., Liu, H. N., Lokotko, T., MacCormick, M., Moschner, K., Nakamura, T., Park, S. Y., Rossi, D., Sahin, E., Soderstrom, P-A, Takeuchi, S., Tornqvist, H., Vaquero, V., Wagner, V, Wang, S., Werner, V, Xu, X., Yamada, H., Yan, D., Yang, Z., Yasuda, M., and Zanetti, L.

Abstract

The nuclear structure of Ar-51, an uncharted territory so far, was studied by the (p,2p) reaction using gamma-ray spectroscopy for the bound states and the invariant mass method for the unbound states. Two peaks were detected in the gamma-ray spectrum and six peaks were observed in the Ar-50+n relative energy spectrum. Comparing the results to our shell-model calculations, two bound and six unbound states were established. Three of the unbound states could only be placed tentatively due to the low number of counts in the relative energy spectrum of events associated with the decay through the first excited state of Ar-50. The low cross sections populating the two bound states of Ar-51 could be interpreted as a clear signature for the presence of significant subshell closures at neutron numbers 32 and 34 in argon isotopes. It was also revealed that due to the two valence holes, unbound collective states coexist with individual-particle states in Ar-51. (C) 2021 The Author(s). Published by Elsevier B.V.

Published
2021

12. Manifestation of the Berry phase in the atomic nucleus Pb-213

Author

Valiente-Dobon, J. J., Gottardo, A., Benzoni, G., Gadea, A., Lunardi, S., Algora, A., de Angelis, G., Bazzacco, D., Benlliure, J., Boutachkov, P., Bracco, A., Bruce, A. M., Camera, F., Casarejos, E., Cortes, M. L., Crespi, F. C. L., Corsi, A., Domingo-Pardo, C., Doncel, M., Engert, T., Geissel, H., Gerl, J., Goasduff, A., Goel, N., Gorska, M., Grebosz, J., Gregor, E., Habermann, T., Klupp, S., Kojouharov, I., Kurz, N., Lenzi, S. M., Leoni, S., Mandal, S., Menegazzo, R., Mengoni, D., Million, B., Morales, A. I., Napoli, D. R., Naqvi, F., Nociforo, C., Pfutzner, M., Pietri, S., Podolyak, Zs., Prochazka, A., Recchia, F., Regan, P. H., Rudolph, D., Sahin, E., Schaffner, H., Sharma, A., Sitar, B., Siwal, D., Strmen, P., Szarka, I, Ur, C. A., Walker, P. M., Weick, H., Wieland, O., Wollersheim, H. -J., Van Isacker, P., Valiente-Dobon, J. J., Gottardo, A., Benzoni, G., Gadea, A., Lunardi, S., Algora, A., de Angelis, G., Bazzacco, D., Benlliure, J., Boutachkov, P., Bracco, A., Bruce, A. M., Camera, F., Casarejos, E., Cortes, M. L., Crespi, F. C. L., Corsi, A., Domingo-Pardo, C., Doncel, M., Engert, T., Geissel, H., Gerl, J., Goasduff, A., Goel, N., Gorska, M., Grebosz, J., Gregor, E., Habermann, T., Klupp, S., Kojouharov, I., Kurz, N., Lenzi, S. M., Leoni, S., Mandal, S., Menegazzo, R., Mengoni, D., Million, B., Morales, A. I., Napoli, D. R., Naqvi, F., Nociforo, C., Pfutzner, M., Pietri, S., Podolyak, Zs., Prochazka, A., Recchia, F., Regan, P. H., Rudolph, D., Sahin, E., Schaffner, H., Sharma, A., Sitar, B., Siwal, D., Strmen, P., Szarka, I, Ur, C. A., Walker, P. M., Weick, H., Wieland, O., Wollersheim, H. -J., and Van Isacker, P.

Abstract

The neutron-rich Pb-213 isotope was produced in the fragmentation of a primary 1 GeV A U-238 beam, separated in FRS in mass and atomic number, and then implanted for isomer decay gamma-ray spectroscopy with the RISING setup at GSI. A newly observed isomer and its measured decay properties indicate that states in Pb-213 are characterized by the seniority quantum number that counts the nucleons not in pairs coupled to angular momentum J = 0. The conservation of seniority is a consequence of a geometric phase associated with particle-hole conjugation, which becomes observable in semi-magic nuclei where nucleons half-fill the valence shell. The gamma-ray spectroscopic observables in Pb-213 are thus found to be driven by two mechanisms, particle-hole conjugation and seniority conservation, which are intertwined through a Berry phase. (C) 2021 The Authors. Published by Elsevier B.V.

Published
2021

13. Restoration of the natural (1/2 ) - (3/2 ) energy splitting in odd-K isotopes towards = 40

Author

Sun, Y.L., Obertelli, A., Doornenbal, P., Barbieri, C., Chazono, Y., Duguet, T., Liu, H.N., Navrátil, P., Nowacki, F., Ogata, K., Otsuka, T., Raimondi, F., Somà, V., Utsuno, Y., Yoshida, K., Achouri, N., Baba, H., Browne, F., Calvet, D., Château, F., Chen, S., Chiga, N., Corsi, A., Cortés, M.L., Delbart, A., Gheller, J.M., Giganon, A., Gillibert, A., Hilaire, C., Isobe, T., Kobayashi, T., Kubota, Y., Lapoux, V., Motobayashi, T., Murray, I., Otsu, H., Panin, V., Paul, N., Rodriguez, W., Sakurai, H., Sasano, M., Steppenbeck, D., Stuhl, L., Togano, Y., Uesaka, T., Wimmer, K., Yoneda, K., Aktas, O., Aumann, T., Chung, L.X., Flavigny, F., Franchoo, S., Gašparić, I., Gerst, R.B., Gibelin, J., Hahn, K.I., Kim, D., Koiwai, T., Kondo, Y., Koseoglou, P., Lee, J., Lehr, C., Linh, B.D., Lokotko, T., MacCormick, M., Moschner, K., Nakamura, T., Park, S.Y., Rossi, D., Sahin, E., Sohler, D., Söderström, P.A., Takeuchi, S., Törnqvist, H., Vaquero, V., Wagner, V., Wang, S., Werner, V., Xu, X., Yamada, H., Yan, D., Yang, Z., Yasuda, M., and Zanetti, L.

Abstract

We report on the first γ-ray spectroscopy of $^{51,53}$K produced via the $^{52,54}$Ca(p,2p) reactions at ∼250 MeV/nucleon. Unambiguous final-state angular-momentum assignments were achieved for beam intensities down to few particles per second by using a new technique based on reaction vertex tracking combined with a thick liquid-hydrogen target. Through γ-ray spectroscopy and exclusive parallel momentum distribution analysis, 3/2$^{+}$ ground states and 1/2$^{+}$ first excited states in $^{51,53}$K were established quantifying the natural ordering of the 1d3/2 and 2s1/2 proton-hole states that are restored at N = 32 and 34. State-of-the-art ab initio calculations and shell-model calculations with improved phenomenological effective interactions reproduce the present data and predict consistently the increase of the E(1/21+) - E(3/21+) energy differences towards N = 40.

Published
2020

14. Shell evolution of N=40 isotones towards Ca-60: First spectroscopy of Ti-62

Author

Cortes, M. L., Rodriguez, W., Doornenbal, P., Obertelli, A., Holt, J. D., Lenzi, S. M., Menendez, J., Nowacki, F., Ogata, K., Poves, A., Rodriguez, T. R., Schwenk, A., Simonis, J., Stroberg, S. R., Yoshida, K., Achouri, L., Baba, H., Browne, F., Calvet, D., Chateau, F., Chen, S., Chiga, N., Corsi, A., Delbart, A., Gheller, J-M, Giganon, A., Gillibert, A., Hilaire, C., Isobe, T., Kobayashi, T., Kubota, Y., Lapoux, V, Liu, H. N., Motobayashi, T., Murray, I, Otsu, H., Panin, V, Paul, N., Sakurai, H., Sasano, M., Steppenbeck, D., Stuhl, L., Sun, Y. L., Togano, Y., Uesaka, T., Wimmer, K., Yoneda, K., Aktas, O., Aumann, T., Chung, L. X., Flavigny, F., Franchoo, S., Gasparic, I, Gerst, R-B, Gibelin, J., Hahn, K., I, Kim, D., Koiwai, T., Kondo, Y., Koseoglou, R., Lee, J., Lehr, C., Linh, D., Lokotko, T., MacCormick, M., Moschner, K., Nakamura, T., Park, S. Y., Rossi, D., Sahin, E., Sohler, D., Soederstroem, R-A, Takeuchi, S., Toernqvist, H., Vaquero, V., Wagner, V, Wang, S., Werner, V, Xu, X., Yamada, H., Yan, D., Yang, Z., Yasuda, M., Zanetti, L., Cortes, M. L., Rodriguez, W., Doornenbal, P., Obertelli, A., Holt, J. D., Lenzi, S. M., Menendez, J., Nowacki, F., Ogata, K., Poves, A., Rodriguez, T. R., Schwenk, A., Simonis, J., Stroberg, S. R., Yoshida, K., Achouri, L., Baba, H., Browne, F., Calvet, D., Chateau, F., Chen, S., Chiga, N., Corsi, A., Delbart, A., Gheller, J-M, Giganon, A., Gillibert, A., Hilaire, C., Isobe, T., Kobayashi, T., Kubota, Y., Lapoux, V, Liu, H. N., Motobayashi, T., Murray, I, Otsu, H., Panin, V, Paul, N., Sakurai, H., Sasano, M., Steppenbeck, D., Stuhl, L., Sun, Y. L., Togano, Y., Uesaka, T., Wimmer, K., Yoneda, K., Aktas, O., Aumann, T., Chung, L. X., Flavigny, F., Franchoo, S., Gasparic, I, Gerst, R-B, Gibelin, J., Hahn, K., I, Kim, D., Koiwai, T., Kondo, Y., Koseoglou, R., Lee, J., Lehr, C., Linh, D., Lokotko, T., MacCormick, M., Moschner, K., Nakamura, T., Park, S. Y., Rossi, D., Sahin, E., Sohler, D., Soederstroem, R-A, Takeuchi, S., Toernqvist, H., Vaquero, V., Wagner, V, Wang, S., Werner, V, Xu, X., Yamada, H., Yan, D., Yang, Z., Yasuda, M., and Zanetti, L.

Abstract

Excited states in the N = 40 isotone Ti-62 were populated via the V-63( p, 2p)Ti-62 reaction at similar to 200MeV/nucleonat the Radioactive Isotope Beam Factory and studied using gamma-ray spectroscopy. The energies of the 2(1)(+) -> 0(gs)(+) and 4(1)(+) -> 2(1)(+) transitions, observed here for the first time, indicate a deformed Ti-62 ground state. These energies are increased compared to the neighboring Cr-64 and Fe-66 isotones, suggesting a small decrease of quadrupole collectivity. The present measurement is well reproduced by large-scale shell-model calculations based on effective interactions, while ab initio and beyond mean-field calculations do not yet reproduce our findings. The shell-model calculations for Ti-62 show a dominant configuration with four neutrons excited across the N = 40 gap. Likewise, they indicate that the N = 40 island of inversion extends down to Z = 20, disfavoring a possible doubly magic character of the elusive Ca-60. (C) 2019 The Authors. Published by Elsevier B.V.

Published
2020

15. Restoration of the natural E(1/2(1)(+)) - E(3/2(1)(+)) energy splitting in odd -K isotopes towards N=40

Author

Sun, Y. L., Obertelli, A., Doornenbal, P., Barbieri, C., Chazono, Y., Duguet, T., Liu, H. N., Navratil, P., Nowacki, F., Ogata, K., Otsuka, T., Raimondi, F., Soma, V., Utsuno, Y., Yoshida, K., Achouri, N., Baba, H., Browne, F., Calvet, D., Chateau, F., Chen, S., Chiga, N., Corsi, A., Cortes, M. L., Delbart, A., Gheller, J. -M., Giganon, A., Gillibert, A., Hilaire, C., Isobe, T., Kobayashi, T., Kubota, Y., Lapoux, V., Motobayashi, T., Murray, I., Otsu, H., Panin, V., Paul, N., Rodriguez, W., Sakurai, H., Sasano, M., Steppenbeck, D., Stuhl, L., Togano, Y., Uesaka, T., Wimmer, K., Yoneda, K., Aktas, O., Aumann, T., Chung, L. X., Flavigny, F., Franchoo, S., Gasparic, I., Gerst, R. -B., Gibelin, J., Hahn, K. I., Kim, D., Koiwai, T., Kondo, Y., Koseoglou, P., Lee, J., Lehr, C., Linh, B. D., Lokotko, T., MacCormick, M., Moschner, K., Nakamura, T., Park, S. Y., Rossi, D., Sahin, E., Sohler, D., Soederstroem, P. -A., Takeuchi, S., Toernqvist, H., Vaquero, V., Wagner, V., Wang, S., Werner, V., Xu, X., Yamada, H., Yan, D., Yang, Z., Yasuda, M., Zanetti, L., Sun, Y. L., Obertelli, A., Doornenbal, P., Barbieri, C., Chazono, Y., Duguet, T., Liu, H. N., Navratil, P., Nowacki, F., Ogata, K., Otsuka, T., Raimondi, F., Soma, V., Utsuno, Y., Yoshida, K., Achouri, N., Baba, H., Browne, F., Calvet, D., Chateau, F., Chen, S., Chiga, N., Corsi, A., Cortes, M. L., Delbart, A., Gheller, J. -M., Giganon, A., Gillibert, A., Hilaire, C., Isobe, T., Kobayashi, T., Kubota, Y., Lapoux, V., Motobayashi, T., Murray, I., Otsu, H., Panin, V., Paul, N., Rodriguez, W., Sakurai, H., Sasano, M., Steppenbeck, D., Stuhl, L., Togano, Y., Uesaka, T., Wimmer, K., Yoneda, K., Aktas, O., Aumann, T., Chung, L. X., Flavigny, F., Franchoo, S., Gasparic, I., Gerst, R. -B., Gibelin, J., Hahn, K. I., Kim, D., Koiwai, T., Kondo, Y., Koseoglou, P., Lee, J., Lehr, C., Linh, B. D., Lokotko, T., MacCormick, M., Moschner, K., Nakamura, T., Park, S. Y., Rossi, D., Sahin, E., Sohler, D., Soederstroem, P. -A., Takeuchi, S., Toernqvist, H., Vaquero, V., Wagner, V., Wang, S., Werner, V., Xu, X., Yamada, H., Yan, D., Yang, Z., Yasuda, M., and Zanetti, L.

Abstract

We report on the first gamma-ray spectroscopy of K-51,K-53 produced via the Ca-52,Ca-54(p,2p) reactions at similar to 250 MeV/nucleon. Unambiguous final-state angular-momentum assignments were achieved for beam intensities down to few particles per second by using a new technique based on reaction vertex tracking combined with a thick liquid-hydrogen target. Through gamma-ray spectroscopy and exclusive parallel momentum distribution analysis, 3/(2)+ ground states and 1/2(+) first excited states in K-51,K-53 were established quantifying the natural ordering of the 1d(3/2) and 2s(1/2) proton-hole states that are restored at N = 32 and 34. State-of-the-art ab initio calculations and shell-model calculations with improved phenomenological effective interactions reproduce the present data and predict consistently the increase of the E(1/4)- E(3/4) energy differences towards N = 40. (C) 2020 The Authors. Published by Elsevier B.V.

Published
2020

16. Shell evolution of = 40 Isotones Towards Ca: First spectroscopy of Ti

Author

Cortés, M.L., Rodriguez, W., Doornenbal, P., Obertelli, A., Holt, J.D., Lenzi, S.M., Menéndez, J., Nowacki, F., Ogata, K., Poves, A., Rodríguez, T.R., Schwenk, A., Simonis, J., Stroberg, S.R., Yoshida, K., Achouri, L., Baba, H., Browne, F., Calvet, D., Château, F., Chen, S., Chiga, N., Corsi, A., Delbart, A., Gheller, J.M., Giganon, A., Gillibert, A., Hilaire, C., Isobe, T., Kobayashi, T., Kubota, Y., Lapoux, V., Liu, H.N., Motobayashi, T., Murray, I., Otsu, H., Panin, V., Paul, N., Sakurai, H., Sasano, M., Steppenbeck, D., Stuhl, L., Sun, Y.L., Togano, Y., Uesaka, T., Wimmer, K., Yoneda, K., Aktas, O., Aumann, T., Chung, L.X., Flavigny, F., Franchoo, S., Gašparić, I., Gerst, R.B., Gibelin, J., Hahn, K.I., Kim, D., Koiwai, T., Kondo, Y., Koseoglou, P., Lee, J., Lehr, C., Linh, B.D., Lokotko, T., MacCormick, M., Moschner, K., Nakamura, T., Park, S.Y., Rossi, D., Sahin, E., Sohler, D., Söderström, P.A., Takeuchi, S., Toernqvist, H., Vaquero, V., Wagner, V., Wang, S., Werner, V., Xu, X., Yamada, H., Yan, D., Yang, Z., Yasuda, M., and Zanetti, L.

Abstract

Excited states in the N=40 isotone $^{62}$Ti were populated via the $^{63}$V(p,2p)$^{62}$Ti reaction at ∼200 MeV/nucleon at the Radioactive Isotope Beam Factory and studied using γ-ray spectroscopy. The energies of the 21+→0gs+ and 41+→21+ transitions, observed here for the first time, indicate a deformed $^{62}$Ti ground state. These energies are increased compared to the neighboring $^{64}$Cr and $^{66}$Fe isotones, suggesting a small decrease of quadrupole collectivity. The present measurement is well reproduced by large-scale shell-model calculations based on effective interactions, while ab initio and beyond mean-field calculations do not yet reproduce our findings. The shell-model calculations for $^{62}$Ti show a dominant configuration with four neutrons excited across the N=40 gap. Likewise, they indicate that the N=40 island of inversion extends down to Z=20, disfavoring a possible doubly magic character of the elusive $^{60}$Ca.

Published
2019

17. Discovery of Br in secondary reactions of radioactive beams

Author

Wimmer, K., Doornenbal, P., Korten, W., Aguilera, P., Algora, A., Ando, T., Arici, T., Baba, H., Blank, B., Boso, A., Chen, S., Corsi, A., Davies, P., de Angelis, G., de France, G., Doherty, D.T., Gerl, J., Gernhäuser, R., Jenkins, D.G., Koyama, S., Motobayashi, T., Nagamine, S., Niikura, M., Obertelli, A., Lubos, D., Rubio, B., Sahin, E., Saito, T.Y., Sakurai, H., Sinclair, L., Steppenbeck, D., Taniuchi, R., Wadsworth, R., and Zielinska, M.

Abstract

The proton-rich isotope $^{68}$Br was discovered in secondary fragmentation reactions of fast radioactive beams. Proton-rich secondary beams of $^{70,71,72}$Kr and $^{70}$Br, produced at the RIKEN Nishina Center and identified by the BigRIPS fragment separator, impinged on a secondary $^{9}$Be target. Unambiguous particle identification behind the secondary target was achieved with the ZeroDegree spectrometer. Based on the expected direct production cross sections from neighboring isotopes, the lifetime of the ground or long-lived isomeric state of $^{68}$Br was estimated. The results suggest that secondary fragmentation reactions, where relatively few nucleons are removed from the projectile, offer an alternative way to search for new isotopes, as these reactions populate preferentially low-lying states.

Published
2019

18. Re-estimation of Ta nucleosynthesis in light of newly constrained reaction rates

Author

Malatji, K.L., Wiedeking, M., Goriely, S., Brits, C.P., Kheswa, B.V., Bello Garrote, F.L., Bleuel, D.L., Giacoppo, F., Görgen, A., Guttormsen, M., Hadynska-Klek, K., Hagen, T.W., Ingeberg, V.W., Klintefjord, M., Larsen, A.C., Papka, P., Renstrøm, T., Sahin, E., Siem, S., Siess, L., Tveten, G.M., and Zeiser, F.

Abstract

Recent measurements of the nuclear level densities and γ-ray strength functions below the neutron thresholds in $^{180,181,182}$Ta are used as input in the nuclear reaction code TALYS. These experimental average quantities are utilized in the calculations of the $^{179,180,181}$Ta radiative neutron capture cross sections. From the latter, astrophysical Maxwellian-averaged (n,γ) cross sections (MACS) and reaction rates are extracted, which in turn are used in large astrophysical network calculations to probe the production mechanism of $^{180}$Ta. These calculations are performed for two scenarios, the s-process production of $^{180,181}$Ta in Asymptotic Giant Branch (AGB) stars and the p-process nucleosynthesis of Tam180 in Type-II supernovae. Based on the results from this work, the s-process in stellar evolution is considered negligible in the production of Tam180 whereas $^{181}$Ta is partially produced by AGB stars. The new measurements strongly constrain the production and destruction rates of Tam180 at p-process temperatures and confirm significant production of nature's rarest stable isotope Tam180 by the p-process.

Published
2019

19. Shape coexistence and isospin symmetry in = 70 nuclei: Spectroscopy of the = −1 Nucleus Kr

Author

Wimmer, K., Korten, W., Arici, T., Doornenbal, P., Aguilera, P., Algora, A., Ando, T., Baba, H., Blank, B., Boso, A., Chen, S., Corsi, A., Davies, P., de Angelis, G., de France, G., Doherty, D.T., Gerl, J., Gernhäuser, R., Jenkins, D., Koyama, S., Motobayashi, T., Nagamine, S., Niikura, M., Obertelli, A., Lubos, D., Rubio, B., Sahin, E., Saito, T.Y., Sakurai, H., Sinclair, L., Steppenbeck, D., Taniuchi, R., Wadsworth, R., and Zielinska, M.

Abstract

Excited states in the Tz=−1 nucleus $^{70}$Kr have been populated using inelastic scattering of a radioactive $^{70}$Kr beam as well as one- and two-neutron removal reactions from $^{71,72}$Kr at intermediate beam energies. The level scheme of $^{70}$Kr was constructed from the observed γ-ray transitions and coincidences. Tentative spin and parity assignments were made based on comparison with the mirror nucleus $^{70}$Se. A second 2+ state and a candidate for the corresponding 42+ state suggest shape coexistence in $^{70}$Kr.

Published
2018

20. Spectroscopy of Mn: Strong coupling in the = 40 'island of Inversion'

Author

Liu, X.Y., Liu, Z., Ding, B., Doornenbal, P., Obertelli, A., Lenzi, S.M., Walker, P.M., Chung, L.X., Linh, B.D., Authelet, G., Baba, H., Calvet, D., Château, F., Corsi, A., Delbart, A., Gheller, J.M., Gillibert, A., Isobe, T., Lapoux, V., Matsushita, M., Momiyama, S., Motobayashi, T., Niikura, M., Nowacki, F., Otsu, H., Péron, C., Peyaud, A., Pollacco, E.C., Roussé, J.Y., Sakurai, H., Sasano, M., Shiga, Y., Takeuchi, S., Taniuchi, R., Uesaka, T., Wang, H., Yoneda, K., Lam, Y.H., Huang, T.H., Sun, M.D., Zhang, W.Q., Lu, H.Y., Hou, D.S., Browne, F., Dombradi, Zs., Franchoo, S., Giacoppo, F., Gottardo, A., Hadynska-Klek, K., Korkulu, Z., Koyama, S., Kubota, Y., Lee, J., Lettmann, M., Lozeva, R., Matsui, K., Miyazaki, T., Nishimura, S., Louchart, C., Olivier, L., Ota, S., Patel, Z., Sahin, E., Santamaria, C., Shand, C., Söderström, P.A., Stefan, G.L., Steppenbeck, D., Sumikama, T., Suzuki, D., Vajta, Zs., Werner, V., Wu, J., Xu, Z., Zhou, X.H., Zhang, Y.H., Xu, H.S., and Zhang, F.S.

Abstract

Excited states in $^{63,65,67}$Mn were studied via in-beam γ-ray spectroscopy following knockout reactions from $^{68}$Fe. Similar level schemes, consisting of the 11/2$^{−}$, 9/2$^{−}$, 7/2$^{−}$ and 5/2g.s.− level sequence, connected by I→I−1 transitions, were established, the first time for $^{65,67}$Mn. Their level structures show features consistent with strongly-coupled rotational bands with K=5/2. State-of-the-art shell-model calculations with the modified LNPS effective interaction reproduce the observed levels remarkably well and suggest the dominance of 4-particle-4-hole neutron configurations for all the states. The data on the low-lying excited states of odd-mass $^{53−67}$Mn provide a textbook example of nuclear structure evolution from weak coupling through decoupling to strong coupling along a single isotopic chain on the n-rich side of the β stability line. These results help to deepen our understanding of the N=40 “island of inversion”.

Published
2018

21. Is seniority a partial dynamic symmetry in the first Shell?

Author

Morales, A.I., Benzoni, G., Watanabe, H., de Angelis, G., Nishimura, S., Coraggio, L., Gargano, A., Itaco, N., Otsuka, T., Tsunoda, Y., Van Isacker, P., Browne, F., Daido, R., Doornenbal, P., Fang, Y., Lorusso, G., Patel, Z., Rice, S., Sinclair, L., Söderström, P.A., Sumikama, T., Valiente-Dobón, J.J., Wu, J., Xu, Z.Y., Yagi, A., Yokoyama, R., Baba, H., Avigo, R., Bello Garrote, F.L., Blasi, N., Bracco, A., Bruce, A.M., Camera, F., Ceruti, S., Crespi, F.C.L., Delattre, M.C., Dombradi, Zs., Gottardo, A., Isobe, T., Kojouharov, I., Kurz, N., Kuti, I., Lalkovski, S., Matsui, K., Melon, B., Mengoni, D., Miyazaki, T., Modamio-Hoybjor, V., Momiyama, S., Napoli, D.R., Niikura, M., Orlandi, R., Podolyák, Zs., Regan, P.H., Sakurai, H., Sahin, E., Sohler, D., Schaffner, H., Taniuchi, R., Taprogge, J., Vajta, Zs., Wieland, O., and Yalcinkaya, M.

Abstract

The low-lying structures of the midshell νg9/2 Ni isotopes $^{72}$Ni and $^{74}$Ni have been investigated at the RIBF facility in RIKEN within the EURICA collaboration. Previously unobserved low-lying states were accessed for the first time following β decay of the mother nuclei $^{72}$Co and $^{74}$Co. As a result, we provide a complete picture in terms of the seniority scheme up to the first (8+) levels for both nuclei. The experimental results are compared to shell-model calculations in order to define to what extent the seniority quantum number is preserved in the first neutron g9/2 shell. We find that the disappearance of the seniority isomerism in the (81+) states can be explained by a lowering of the seniority-four (6+) levels as predicted years ago. For $^{74}$Ni, the internal de-excitation pattern of the newly observed (62+) state supports a restoration of the normal seniority ordering up to spin J=4. This property, unexplained by the shell-model calculations, is in agreement with a dominance of the single-particle spherical regime near $^{78}$Ni.

Published
2018

22. New μs Isomers in the Neutron-rich 210Hg Nucleus

Author

Gottardo, A., Valiente-Dobon, J. J., Benzoni, G., Gadea, A., Lunardi, S., Boutachkov, P., Bruce, A. M., Gorska, M., Grebosz, J., Pietri, S., Podolyak, Z. S., Pfuetzner, M., Regan, P. H., Weick, H., Nunez, J. Alcantara, Algora, A., Al-Dahan, N., de Angelis, G., Ayyad, Y., Alkhomashi, N., Allegro, P. R. P., Bazzacco, D., Benlliure, J., Bowry, M., Bracco, A., Bunce, M., Camera, F., Casarejos, E., Cortes, M. L., Crespi, F. C. L., Corsi, A., Bacelar, A. M. Denis, Deo, A. Y., Domingo-Pardo, C., Doncel, M., Dombradi, Z. S., Engert, T., Eppinger, K., Farrelly, G. F., Farinon, E., Farnea, E., Geissel, H., Gerl, J., Goel, N., Gregor, E., Habermann, T., Hoischen, Robert, Janik, R., John, P. R., Klupp, S., Kojouharov, I., Kurz, N., Lenzi, S. M., Leoni, S., Mandal, S., Menegazzo, R., Mengoni, D., Million, B., Modamio, V., Morales, A. I., Napoli, D. R., Naqvi, F., Nicolini, R., Nociforo, C., Prochazka, A., Prokopowicz, W., Recchia, E., Ribas, R. V., Reed, M. W., Rudolph, Dirk, Sahin, E., Schaffner, H., Sharma, A., Sitar, B., Siwal, D., Steiger, K., Strmen, P., Swan, T. P. D., Szarka, I., Ur, C. A., Walker, P. M., Wieland, O., Wollersheim, H. -J., Gottardo, A., Valiente-Dobon, J. J., Benzoni, G., Gadea, A., Lunardi, S., Boutachkov, P., Bruce, A. M., Gorska, M., Grebosz, J., Pietri, S., Podolyak, Z. S., Pfuetzner, M., Regan, P. H., Weick, H., Nunez, J. Alcantara, Algora, A., Al-Dahan, N., de Angelis, G., Ayyad, Y., Alkhomashi, N., Allegro, P. R. P., Bazzacco, D., Benlliure, J., Bowry, M., Bracco, A., Bunce, M., Camera, F., Casarejos, E., Cortes, M. L., Crespi, F. C. L., Corsi, A., Bacelar, A. M. Denis, Deo, A. Y., Domingo-Pardo, C., Doncel, M., Dombradi, Z. S., Engert, T., Eppinger, K., Farrelly, G. F., Farinon, E., Farnea, E., Geissel, H., Gerl, J., Goel, N., Gregor, E., Habermann, T., Hoischen, Robert, Janik, R., John, P. R., Klupp, S., Kojouharov, I., Kurz, N., Lenzi, S. M., Leoni, S., Mandal, S., Menegazzo, R., Mengoni, D., Million, B., Modamio, V., Morales, A. I., Napoli, D. R., Naqvi, F., Nicolini, R., Nociforo, C., Prochazka, A., Prokopowicz, W., Recchia, E., Ribas, R. V., Reed, M. W., Rudolph, Dirk, Sahin, E., Schaffner, H., Sharma, A., Sitar, B., Siwal, D., Steiger, K., Strmen, P., Swan, T. P. D., Szarka, I., Ur, C. A., Walker, P. M., Wieland, O., and Wollersheim, H. -J.

Abstract

Neutron-rich nuclei in the lead region, beyond N = 126, have been studied at the FRS-RISING setup at GSI, exploiting the fragmentation of a primary uranium beam. Two isomeric states have been identified in Hg-210: the 8(+) isomer expected from the seniority scheme in the vg(9/2) shell and a second one at low spin and low excitation energy. The decay strength of the 8(+) isomer confirms the need of effective three-body forces in the case of neutron-rich lead isotopes. The other unexpected low-lying isomer has been tentatively assigned as a 3(-) state, although this is in contrast with theoretical expectations. (C) 2013 Elsevier B.V. All rights reserved.

Published
2013

23. New mu s isomers in the neutron-rich Hg-210 nucleus

Author

Gottardo, A., Valiente-Dobon, J. J., Benzoni, G., Gadea, A., Lunardi, S., Boutachkov, P., Bruce, A. M., Gorska, M., Grebosz, J., Pietri, S., Podolyak, Z. S., Pfuetzner, M., Regan, P. H., Weick, H., Nunez, J. Alcantara, Algora, A., Al-Dahan, N., de Angelis, G., Ayyad, Y., Alkhomashi, N., Allegro, P. R. P., Bazzacco, D., Benlliure, J., Bowry, M., Bracco, A., Bunce, M., Camera, F., Casarejos, E., Cortes, M. L., Crespi, F. C. L., Corsi, A., Bacelar, A. M. Denis, Deo, A. Y., Domingo-Pardo, C., Doncel, M., Dombradi, Z. S., Engert, T., Eppinger, K., Farrelly, G. F., Farinon, E., Farnea, E., Geissel, H., Gerl, J., Goel, N., Gregor, E., Habermann, T., Hoischen, R., Janik, R., John, P. R., Klupp, S., Kojouharov, I., Kurz, N., Lenzi, S. M., Leoni, S., Mandal, S., Menegazzo, R., Mengoni, D., Million, B., Modamio, V., Morales, A. I., Napoli, D. R., Naqvi, F., Nicolini, R., Nociforo, C., Prochazka, A., Prokopowicz, W., Recchia, E., Ribas, R. V., Reed, M. W., Rudolph, D., Sahin, E., Schaffner, H., Sharma, A., Sitar, B., Siwal, D., Steiger, K., Strmen, P., Swan, T. P. D., Szarka, I., Ur, C. A., Walker, P. M., Wieland, O., Wollersheim, H. -J., Gottardo, A., Valiente-Dobon, J. J., Benzoni, G., Gadea, A., Lunardi, S., Boutachkov, P., Bruce, A. M., Gorska, M., Grebosz, J., Pietri, S., Podolyak, Z. S., Pfuetzner, M., Regan, P. H., Weick, H., Nunez, J. Alcantara, Algora, A., Al-Dahan, N., de Angelis, G., Ayyad, Y., Alkhomashi, N., Allegro, P. R. P., Bazzacco, D., Benlliure, J., Bowry, M., Bracco, A., Bunce, M., Camera, F., Casarejos, E., Cortes, M. L., Crespi, F. C. L., Corsi, A., Bacelar, A. M. Denis, Deo, A. Y., Domingo-Pardo, C., Doncel, M., Dombradi, Z. S., Engert, T., Eppinger, K., Farrelly, G. F., Farinon, E., Farnea, E., Geissel, H., Gerl, J., Goel, N., Gregor, E., Habermann, T., Hoischen, R., Janik, R., John, P. R., Klupp, S., Kojouharov, I., Kurz, N., Lenzi, S. M., Leoni, S., Mandal, S., Menegazzo, R., Mengoni, D., Million, B., Modamio, V., Morales, A. I., Napoli, D. R., Naqvi, F., Nicolini, R., Nociforo, C., Prochazka, A., Prokopowicz, W., Recchia, E., Ribas, R. V., Reed, M. W., Rudolph, D., Sahin, E., Schaffner, H., Sharma, A., Sitar, B., Siwal, D., Steiger, K., Strmen, P., Swan, T. P. D., Szarka, I., Ur, C. A., Walker, P. M., Wieland, O., and Wollersheim, H. -J.

Abstract

Neutron-rich nuclei in the lead region, beyond N = 126, have been studied at the FRS-RISING setup at GSI, exploiting the fragmentation of a primary uranium beam. Two isomeric states have been identified in Hg-210: the 8(+) isomer expected from the seniority scheme in the vg(9/2) shell and a second one at low spin and low excitation energy. The decay strength of the 8(+) isomer confirms the need of effective three-body forces in the case of neutron-rich lead isotopes. The other unexpected low-lying isomer has been tentatively assigned as a 3(-) state, although this is in contrast with theoretical expectations. (C) 2013 Elsevier B.V. All rights reserved.

Published
2013

24. First measurement of beta decay half-lives in neutron-rich Tl and Bi isotopes

Author

Benzoni, G., Morales, A. I., Valiente-Dobon, J. J., Gottardo, A., Bracco, A., Camera, F., Crespi, F. C. L., Corsi, A. M., Leoni, S., Million, B., Nicolini, R., Wieland, O., Gadea, A., Lunardi, S., Boutachkov, P., Bruce, A. M., Gorska, M., Grebosz, J., Pietri, S., Podolyak, Zs., Pfuetzner, M., Regan, P. H., Weick, H., Alcantara Nunez, J., Algora, A., Al-Dahan, N., de Angelis, G., Ayyad, Y., Alkhomashi, N., Allegro, P. R. P., Bazzacco, D., Benlliure, J., Bowry, M., Bunce, M., Casarejos, E., Cortes, M. L., Bacelar, A. M. Denis, Deo, A. Y., Domingo-Pardo, C., Doncel, M., Dombradi, Zs., Engert, T., Eppinger, K., Farrelly, G. F., Farinon, F., Farnea, E., Geissel, H., Gerl, J., Goel, N., Gregor, E., Habermann, T., Hoischen, R., Janik, R., Klupp, S., Kojouharov, I., Kurz, N., Mandal, S., Menegazzo, R., Mengoni, D., Napoli, D. R., Naqvi, F., Nociforo, C., Prochazka, A., Prokopowicz, W., Recchia, F., Ribas, R. V., Reed, M. W., Rudolph, D., Sahin, E., Schaffner, H., Sharma, A., Sitar, B., Siwal, D., Steiger, K., Strmen, P., Swan, T. P. D., Szarka, I., Ur, C. A., Walker, P. M., Wollersheim, H. -J., Benzoni, G., Morales, A. I., Valiente-Dobon, J. J., Gottardo, A., Bracco, A., Camera, F., Crespi, F. C. L., Corsi, A. M., Leoni, S., Million, B., Nicolini, R., Wieland, O., Gadea, A., Lunardi, S., Boutachkov, P., Bruce, A. M., Gorska, M., Grebosz, J., Pietri, S., Podolyak, Zs., Pfuetzner, M., Regan, P. H., Weick, H., Alcantara Nunez, J., Algora, A., Al-Dahan, N., de Angelis, G., Ayyad, Y., Alkhomashi, N., Allegro, P. R. P., Bazzacco, D., Benlliure, J., Bowry, M., Bunce, M., Casarejos, E., Cortes, M. L., Bacelar, A. M. Denis, Deo, A. Y., Domingo-Pardo, C., Doncel, M., Dombradi, Zs., Engert, T., Eppinger, K., Farrelly, G. F., Farinon, F., Farnea, E., Geissel, H., Gerl, J., Goel, N., Gregor, E., Habermann, T., Hoischen, R., Janik, R., Klupp, S., Kojouharov, I., Kurz, N., Mandal, S., Menegazzo, R., Mengoni, D., Napoli, D. R., Naqvi, F., Nociforo, C., Prochazka, A., Prokopowicz, W., Recchia, F., Ribas, R. V., Reed, M. W., Rudolph, D., Sahin, E., Schaffner, H., Sharma, A., Sitar, B., Siwal, D., Steiger, K., Strmen, P., Swan, T. P. D., Szarka, I., Ur, C. A., Walker, P. M., and Wollersheim, H. -J.

Abstract

Neutron-rich isotopes around lead, beyond N = 126, have been studied exploiting the fragmentation of an uranium primary beam at the FRS-RISING setup at GSI. For the first time beta-decay half-lives of Bi-219 and Tl-211,Tl-212,Tl-213 isotopes have been derived. The half-lives have been extracted using a numerical simulation developed for experiments in high-background conditions. Comparison with state of the art models used in r-process calculations is given, showing a systematic underestimation of the experimental values, at variance from close-lying nuclei. (c) 2012 Elsevier B.V. All rights reserved.

Published
2012

25. First measurement of beta decay half-lives in neutron-rich Tl and Bi isotopes

Author

Benzoni, G, Morales, AI, Bracco, A, Camera, F, Crespi, FCL, Corsi, AM, Leoni, S, Million, B, Nicolini, R, Wieland, O, Valiente-Dobón, JJ, Gottardo, A, de Angelis, G, Napoli, DR, Sahin, E, Lunardi, S, Gadea, A, Algora, A, Bazzacco, D, Farnea, E, Menegazzo, R, Mengoni, D, Recchia, F, Ur, CA, Boutachkov, P, Górska, M, Pietri, S, Weick, H, Cortes, ML, Domingo-Pardo, C, Engert, T, Farinon, F, Geissel, H, Gerl, J, Goel, N, Gregor, E, Habermann, T, Hoischen, R, Kojouharov, I, Kurz, N, Naqvi, F, Nociforo, C, Prochazka, A, Prokopowicz, W, Schaffner, H, Sharma, A, Wollersheim, H-J, Bruce, AM, Denis Bacelar, AM, Grebosz, J, Podolyak, Z, Regan, PH, Al-Dahan, N, Bowry, M, Bunce, M, Deo, AY, Farrelly, GF, Reed, MW, Swan, TPD, Walker, PM, Pfützner, M, Alcántara Núñez, J, Ayyad, Y, Benlliure, J, Alkhomashi, N, Allegro, PRP, Ribas, RV, Casarejos, E, Doncel, M, Dombradi, Z, Eppinger, K, Klupp, S, Steiger, K, Rudolph, D, Janik, R, Sitar, B, Strmen, P, Szarka, I, Mandal, S, Siwal, D, Benzoni, G, Morales, AI, Bracco, A, Camera, F, Crespi, FCL, Corsi, AM, Leoni, S, Million, B, Nicolini, R, Wieland, O, Valiente-Dobón, JJ, Gottardo, A, de Angelis, G, Napoli, DR, Sahin, E, Lunardi, S, Gadea, A, Algora, A, Bazzacco, D, Farnea, E, Menegazzo, R, Mengoni, D, Recchia, F, Ur, CA, Boutachkov, P, Górska, M, Pietri, S, Weick, H, Cortes, ML, Domingo-Pardo, C, Engert, T, Farinon, F, Geissel, H, Gerl, J, Goel, N, Gregor, E, Habermann, T, Hoischen, R, Kojouharov, I, Kurz, N, Naqvi, F, Nociforo, C, Prochazka, A, Prokopowicz, W, Schaffner, H, Sharma, A, Wollersheim, H-J, Bruce, AM, Denis Bacelar, AM, Grebosz, J, Podolyak, Z, Regan, PH, Al-Dahan, N, Bowry, M, Bunce, M, Deo, AY, Farrelly, GF, Reed, MW, Swan, TPD, Walker, PM, Pfützner, M, Alcántara Núñez, J, Ayyad, Y, Benlliure, J, Alkhomashi, N, Allegro, PRP, Ribas, RV, Casarejos, E, Doncel, M, Dombradi, Z, Eppinger, K, Klupp, S, Steiger, K, Rudolph, D, Janik, R, Sitar, B, Strmen, P, Szarka, I, Mandal, S, and Siwal, D

Abstract

Neutron-rich isotopes around lead, beyond N= 126, have been studied exploiting the fragmentation of an uranium primary beam at the FRS-RISING setup at GSI. For the first time β-decay half-lives of Bi and Tl isotopes have been derived. The half-lives have been extracted using a numerical simulation developed for experiments in high-background conditions. Comparison with state of the art models used in r-process calculations is given, showing a systematic underestimation of the experimental values, at variance from close-lying nuclei. © 2012 Elsevier B.V.

Published
2012

26. Conceptual design and infrastructure for the installation of the first AGATA sub-array at LNL

Author

Gadea, A., Farnea, E., Valiente-Dobon, J. J., Million, B., Mengoni, D., Bazzacco, D., Recchia, F., Dewald, A., Pissulla, Th., Rother, W., de Angelis, G., Austin, A., Aydin, S., Badoer, S., Bellato, M., Benzoni, G., Berti, L., Beunard, R., Birkenbach, B., Bissiato, E., Blasi, N., Boiano, C., Bortolato, D., Bracco, A., Brambilla, S., Bruyneel, B., Calore, E., Camera, F., Capsoni, A., Chavas, J., Cocconi, P., Coelli, S., Colombo, A., Conventi, D., Costa, L., Corradi, L., Corsi, A., Cortesi, A., Crespi, F. C. L., Dosme, N., Eberth, J., Fantinel, S., Fanin, C., Fioretto, E., Fransen, Ch., Giaz, A., Gottardo, A., Grave, X., Grebosz, J., Griffiths, R., Grodner, E., Gulmini, M., Habermann, T., He, C., Hess, H., Isocrate, R., Jolie, J., Jones, P., Latina, A., Legay, E., Lenzi, S., Leoni, S., Lelli, F., Lersch, D., Lunardi, S., Maron, G., Menegazzo, R., Michelagnoli, C., Molini, P., Montagnoli, G., Montanari, D., Moeller, O., Napoli, D. R., Nicoletto, M., Nicolini, R., Ozille, M., Pascovici, G., Peghin, R., Pignanelli, M., Pucknell, V., Pullia, A., Ramina, L., Rampazzo, G., Rebeschini, M., Reiter, P., Riboldi, S., Rigato, M., Alvarez, C. Rossi, Rosso, D., Salvato, G., Strachan, J., Sahin, E., Scarlassara, F., Simpson, J., Stefanini, A. M., Stezowski, O., Tomasi, F., Toniolo, N., Triossi, A., Turcato, M., Ur, C. A., Vandone, V., Venturelli, R., Veronese, F., Veyssiere, C., Viscione, E., Wieland, O., Wiens, A., Zocca, F., Zucchiatti, A., Gadea, A., Farnea, E., Valiente-Dobon, J. J., Million, B., Mengoni, D., Bazzacco, D., Recchia, F., Dewald, A., Pissulla, Th., Rother, W., de Angelis, G., Austin, A., Aydin, S., Badoer, S., Bellato, M., Benzoni, G., Berti, L., Beunard, R., Birkenbach, B., Bissiato, E., Blasi, N., Boiano, C., Bortolato, D., Bracco, A., Brambilla, S., Bruyneel, B., Calore, E., Camera, F., Capsoni, A., Chavas, J., Cocconi, P., Coelli, S., Colombo, A., Conventi, D., Costa, L., Corradi, L., Corsi, A., Cortesi, A., Crespi, F. C. L., Dosme, N., Eberth, J., Fantinel, S., Fanin, C., Fioretto, E., Fransen, Ch., Giaz, A., Gottardo, A., Grave, X., Grebosz, J., Griffiths, R., Grodner, E., Gulmini, M., Habermann, T., He, C., Hess, H., Isocrate, R., Jolie, J., Jones, P., Latina, A., Legay, E., Lenzi, S., Leoni, S., Lelli, F., Lersch, D., Lunardi, S., Maron, G., Menegazzo, R., Michelagnoli, C., Molini, P., Montagnoli, G., Montanari, D., Moeller, O., Napoli, D. R., Nicoletto, M., Nicolini, R., Ozille, M., Pascovici, G., Peghin, R., Pignanelli, M., Pucknell, V., Pullia, A., Ramina, L., Rampazzo, G., Rebeschini, M., Reiter, P., Riboldi, S., Rigato, M., Alvarez, C. Rossi, Rosso, D., Salvato, G., Strachan, J., Sahin, E., Scarlassara, F., Simpson, J., Stefanini, A. M., Stezowski, O., Tomasi, F., Toniolo, N., Triossi, A., Turcato, M., Ur, C. A., Vandone, V., Venturelli, R., Veronese, F., Veyssiere, C., Viscione, E., Wieland, O., Wiens, A., Zocca, F., and Zucchiatti, A.

Abstract

The first implementation of the AGATA spectrometer consisting of five triple germanium detector clusters has been installed at Laboratori Nazionali di Legnaro, INFN. This setup has two major goals, the first one is to validate the gamma-tracking concept and the second is to perform an experimental physics program using the stable beams delivered by the Tandem-PIAVE-ALPI accelerator complex. A large variety of physics topics will be addressed during this campaign, aiming to investigate both neutron and proton-rich nuclei. The setup has been designed to be coupled with the large-acceptance magnetic-spectrometer PRISMA. Therefore, the in-beam prompt gamma rays detected with AGATA will be measured in coincidence with the products of multinucleon-transfer and deep-inelastic reactions measured by PRISMA. Moreover, the setup is versatile enough to host ancillary detectors, including the heavy-ion detector DANTE, the gamma-ray detector array HELENA, the Cologne plunger for lifetime measurements and the Si-pad telescope TRACE. In this paper the design; characteristics and performance figures of the setup will be described. (C) 2011 Elsevier B.V. All rights reserved.

Published
2011

27. Transition probabilities in 31P and 31S : A test for isospin symmetry

Author

E. Sahin, S. Iliev, S. M. Lenzi, Dimitar Tonev, S. Lunardi, H.-F. Wirth, M. S. Yavahchova, N. Marginean, P. Pavlov, H. Laftchiev, R. Menegazzo, C. A. Ur, E. Farnea, R. P. Singh, G. de Angelis, F. Recchia, E. Geleva, A. Gadea, P. G. Bizzeti, C. Y. He, I.L. Pantaleev, D. R. Napoli, I. Deloncle, M. Stoyanova, Heikki Penttilä, G. De Gregorio, F. Nowacki, D.T. Dimitrov, N. Goutev, A. Demerdjiev, R. Orlandi, Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Tonev, D., de Angelis, G., Deloncle, I., Goutev, N., De Gregorio, G., Pavlov, P., Pantaleev, I. L., Iliev, S., Yavahchova, M. S., Bizzeti, P. G., Demerdjiev, A., Dimitrov, D. T., Farnea, E., Gadea, A., Geleva, E., He, C. Y., Laftchiev, H., Lenzi, S. M., Lunardi, S., Marginean, N., Menegazzo, R., Napoli, D. R., Nowacki, F., Orlandi, R., Penttila, H., Recchia, F., Sahin, E., Singh, R. P., Stoyanova, M., Ur, C. A., and Wirth, H. -F.

Subjects
Nuclear and High Energy Physics, Lifetime measurement, Isoscalar, QC1-999, Lifetime measurements, lifetime measurements, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Resonance (particle physics), Isospin symmetry, transition probabilities, Nuclear physics, Microscopic multiphonon model, Mirror nuclei, mirror nuclei, 0103 physical sciences, Transition probabilities, 010306 general physics, mirror, Physics, Isovector, 010308 nuclear & particles physics, 31S, Charge (physics), 31P, Symmetry (physics), Charged particle, isospin symmetry, Isospin, microscopic multiphonon model, nuclei, ydinfysiikka
Abstract

International audience; Excited states in the mirror nuclei 31P and 31S were populated in the 1p and 1n exit channels of the reaction 20Ne + 12C, at a beam energy of 33 MeV. The 20Ne beam was delivered for the first time by the Piave-Alpi accelerator of the Laboratori Nazionali di Legnaro. Angular correlations of coincident γ-rays and Doppler-shift attenuation lifetime measurements were performed using the multi-detector array GASP in conjunction with the EUCLIDES charged particle detector. In the observed B(E1) strengths, the isoscalar component, amounting to 24% of the isovector one, provides strong evidence for breaking of the isospin symmetry in the A=31 mass region. Self-consistent beyond mean field calculations using Equation of Motion method based on a chiral potential and including two- and three-body forces reproduce well the experimental B(E1) strengths, reinforcing our conclusion. Coherent mixing from higher-lying states involving the Giant Isovector Monopole Resonance accounts well for the effect observed. The breaking of the isospin symmetry originates from the violation of the charge symmetry of the two- and three-body parts of the potential, only related to the Coulomb interaction.

Published
2021

28. Effects of different PCOS phenotypes on placental three-dimensional power Doppler indices and placental volume during the first trimester.

Author

Sahin E, Eraslan Sahin M, Kirlangic MM, Kutuk S, Daglıtuncezdi Cam S, Can Ozdemir H, and Genc E

Subjects
Humans, Female, Pregnancy, Adult, Case-Control Studies, Prospective Studies, Imaging, Three-Dimensional, Organ Size, Young Adult, Pregnancy Trimester, First, Placenta diagnostic imaging, Placenta blood supply, Placenta pathology, Polycystic Ovary Syndrome diagnostic imaging, Polycystic Ovary Syndrome pathology, Ultrasonography, Doppler, Phenotype, Ultrasonography, Prenatal
Abstract

Introduction: The aim of the present study was to evaluate the effects of different polycystic ovary syndrome (PCOS) phenotypes using first-trimester placental three-dimensional power Doppler indices and placental volume., Methods: In this prospective case-control study, 170 pregnant women who met the inclusion criteria were divided into five groups according to PCOS phenotype: non-PCOS control (n = 34), PCOS phenotype A (n = 34), PCOS phenotype B (n = 34), PCOS phenotype C (n = 34), and PCOS phenotype D (n = 34). The primary outcomes determined in the present study were the differences in placental volume and placental flow index (FI), vascularization flow index (VFI), vascularization index (VI), and uterine artery pulsatility index (PI) betweenthe PCOS groups and control group., Results: The mean placental volume and VI were significantly decreased in the phenotype A, B, and C groups compared to the control group and PCOS phenotype D group. The mean FI and VFI were significantly decreased in the phenotype A and B groups compared to the control group and PCOS phenotype C and D groups. The mean testosterone, dehydroepiandrostenedione, sex-hormone binding globulin, free androgen index, and insulin resistance levels were significantly increased in the phenotype A, B, and C groups compared to the control group and PCOS phenotype D group., Discusion: The results indicated that placental volume and placental vascular Doppler indices in the first trimester were more adversely affected in the PCOS A and B phenotypes than other PCOS phenotypes., Competing Interests: Declaration of competing interest None., (Copyright © 2024 Elsevier Ltd. All rights reserved.)

Published
2024
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30. 7,8-Dihydroxyflavone alleviates Endoplasmic Reticulum Stress in cafeteria diet-induced metabolic syndrome.

Author

Sahin E, Saglam N, Erdem S, Alvuroglu E, Abidin I, Yulug E, and Alver A

Subjects
Animals, Apoptosis, Diet, High-Fat adverse effects, Flavones, Male, Mice, Mice, Inbred C57BL, Endoplasmic Reticulum Stress, Metabolic Syndrome drug therapy, Metabolic Syndrome etiology
Abstract

Aims: Prolonged Endoplasmic Reticulum Stress (ERS) is involved in the pathogenesis of metabolic syndrome, including type-2 diabetes mellitus, cardiovascular diseases, atherosclerosis, obesity, and fatty liver disease. There have been significant efforts to discover molecules to treat ERS and/or to ameliorate associate symptoms. In this study, we investigated the effect of 7,8-Dihydroxyflavone (7,8-DHF) on ERS in liver and pancreas tissues in a cafeteria (CAF) diet induced metabolic syndrome model., Main Methods: Male C57BL/6 mice were fed CAF diet for 16 weeks and 7,8-DHF was administered intraperitoneally (5 mg/kg/day) for last four weeks. 78-kDa glucose-regulated protein (GRP78) and C/EBP homologous protein (CHOP) in liver and pancreas tissues, insulin and interleukin-1β (IL-1β) in serum were analyzed by ELISA method and serum biochemistry parameters were analyzed with autoanalyzer. GRP78 and CHOP gene expression levels were determined by qRT-PCR. In addition, histopathological analyzes were performed on liver and pancreas tissues., Key Findings: Findings revealed that CAF diet caused metabolic abnormalities, insulin resistance and inflammation in serum and triggered ERS in pancreas and liver tissues. 7,8-DHF treatment significantly reduced metabolic abnormalities by reducing serum biochemical parameters, HOMO-IR and IL-1β levels. qRT-PCR and ELISA results indicated that 7,8-DHF treatment down-regulated GRP78 and CHOP expression and protein levels in the liver and GRP78 expression in pancreas. Efficiency of 7,8-DHF in these tissues was also demonstrated by histopathological tests., Significance: In conclusion, CAF diet-induced metabolic syndrome model, 7,8-DHF suppressed ERS and ERS-induced metabolic disorders in both liver and pancreas. Therefore, 7,8-DHF may potentially be a novel therapeutic compound to ameliorate ERS and related metabolic symptoms., (Copyright © 2022 Elsevier Inc. All rights reserved.)

Published
2022
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31. First-trimester maternal serum betatrophin levels are decreased in pregnancies complicated by gestational diabetes mellitus.

Author

Kirlangic MM, Eraslan Sahin M, Sahin E, Madendag Y, Col Madendag I, Akdemir E, and Vural Yalman M

Subjects
Angiopoietin-Like Protein 8, Blood Glucose, Female, Glycated Hemoglobin, Humans, Insulin, Pregnancy, Pregnancy Trimester, First, Prospective Studies, Diabetes, Gestational
Abstract

Introduction: The purpose of the present study was to compare maternal serum betatrophin levels during the first trimester from healthy pregnancies to those complicated by gestational diabetes mellitus (GDM)., Methods: In this prospective study, 320 pregnant women were evaluated in their first trimester, and 145 pregnant women who met the inclusion criteria were divided into the following two groups according to GDM screening results: GDM (n:20) and non-diabetic healthy control (n: 125). Samples of maternal serum fasting insulin, fasting blood glucose, hemoglobin (HB)A1c, and betatrophin levels obtained from the women's blood samples between 11 +0/7 -13 +6/7 gestational weeks during first trimester nuchal translucency screening. 75-g oral glucose tolerance test protocol was preferred for GDM scanning between 24 +0/7 -28 +0/7 gestational weeks., Results: Maternal age and first-trimester body mass index (BMI) were higher in the GDM group than in the control group. Gestational age at blood draw was similar between the groups. First-trimester fasting insulin, fasting glucose, hemoglobin (Hb)A1c, thyroid-stimulating hormone, triiodothyronine (sT3), and thyroxine (sT4) were statistically similar between groups. First trimester Homeostatic Model Assessment for Insulin Resistance (HOMA-IR) was 2.67 ± 1.42 in the GDM group and 2.12 ± 1.61 in the control group and not statistically different. Maternal age and BMI adjusted first-trimester maternal serum betatrophin levels were 11.58 ± 6.40 ng/mL in the GDM group and 31.11 ± 3.00 ng/mL in the control group and was statistically lower in the GDM group (p < 0.001)., Discussion: Our results indicated that first trimester maternal serum betatrophin levels are decreased in pregnancies complicated by GDM and first trimester betatrophin levels could be an early screening tool for GDM to allow better pregnancy management., (Copyright © 2022 Elsevier Ltd. All rights reserved.)

Published
2022
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32. Maternal serum telomerase levels increase in pregnancies with mild and severe preeclampsia.

Author

Madendag Y, Sahin E, Col Madendag I, Sahin ME, Kirlangic MM, and Muhtaroglu S

Subjects
Case-Control Studies, Cross-Sectional Studies, Female, Humans, Parity, Pregnancy, Pre-Eclampsia, Telomerase
Abstract

Introduction: Considering that preeclampsia is characterized by oxidative stress, inflammation, and endothelial dysfunction, we hypothesized that preeclampsia and preeclampsia severity may affect the telomerase levels of the mother., Methods: This cross-sectional case control study comprised 86 participants who were separated into three groups as severe preeclampsia, non-severe preeclampsia, and healthy control group. Venous blood samples were obtained from pregnant women with severe preeclampsia just before delivery for biochemical analysis and to evaluate maternal serum telomerase levels. Since gestational age, maternal age and BMI would have an effect on maternal serum telomerase levels, serum samples were taken in the control group and non-severe preeclampsia group at similar gestational age during clinical visits in order to homogenize these parameters, and these patients were followed up. Telomerase levels in maternal serum were evaluated using the enzyme-linked immune-sorbent assay., Results: Maternal age, nulliparity, body mass index (kg/m 2 ) at blood sampling day, ethnicity, smoking and history of caesarian section were statistically similar among the groups. The mean birth weight percentiles were the lowest in the severe preeclampsia group. Fetal growth restriction rates were significantly higher in the severe preeclampsia group than in the non-severe preeclampsia group. Gestational age at blood drawn was similar among groups. Neutrophil lymphocyte ratio, platelet lymphocyte ratio, mean platelet volume, red cell distribution width and white blood cell were statistically different among groups. The serum telomerase level was 1.137 ± 0.390 ng/mL in the severe preeclampsia group, 0.763 ± 0.390 ng/mL in the non-severe preeclampsia group, and 0.425 ± 0.160 ng/mL in the control group (p < .001)., Discussion: This study indicated that maternal serum telomerase levels were significantly increased in both preeclampsia groups., (Copyright © 2022. Published by Elsevier Ltd.)

Published
2022
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33. Effect of preeclampsia and preeclampsia severity on insulin, HOMA-IR, and betatrophin levels in non-diabetic pregnant women.

Author

Akdemir E, Sahin E, Madendag Y, Sahin ME, Madendag IC, Acmaz G, Ozdemir F, Muhtaroglu S, and Muderris II

Subjects
Adult, Angiopoietin-Like Protein 8, Case-Control Studies, Female, Humans, Pregnancy, Young Adult, Angiopoietin-like Proteins blood, Insulin blood, Insulin Resistance, Peptide Hormones blood, Pre-Eclampsia blood
Abstract

Background: The aim of the study was to evaluate the effect of preeclampsia and its severity on insulin, the homeostatic model assessment of insulin resistance (HOMA-IR), and betatrophin levels in non-diabetic pregnant women., Methods: Our study comprised 102 pregnant women who were divided into the following three groups: (1) control, (2) severe preeclampsia, and (3) mild preeclampsia. The women were screened with the single-stage 75-g oral glucose tolerance test (OGTT), and the International Association of Diabetes and Pregnancy Study Groups (IADPSG) criteria were used for diagnosis. Those women with type 2 diabetes (T2D) mellitus or gestational diabetes mellitus (GDM) were excluded from the study., Results: Maternal demographic characteristics were similar among the groups. Fasting plasma glucose and postprandial 2-h plasma glucose levels were significantly increased in the severe-preeclampsia group compared to that in the other groups. Fasting insulin levels were 14.3 ± 8.7uU/mL in the severe-preeclampsia group, 19.1 ± 6.0uU/mL in the mild-preeclampsia group, and 20.5 ± 12.5uU/mL in the control group and significantly lower in the severe-preeclampsia group than in the mild-preeclampsia and control groups. The serum betatrophin level was 7.8 ± 2.6 ng/mL in the severe-preeclampsia group, 6.1 ± 1.8 ng/mL in the mild-preeclampsia group, and 5.8 ± 1.3 ng/mL in the control group and significantly increased in the severe-preeclampsia group compared to other groups. HOMA-IR was similar among the groups. Maternal serum insulin levels were negatively (r = -0,255; P = 0.010) and serum betatrophin levels were positively (r = 0.368; P ≤ 0.001) correlated with preeclampsia severity., Conclusion: Our results indicated that severe preeclampsia effect maternal serum glucose, insulin and betatrophin levels. Histhopatholical and immunohistochemical demostrations on pancreatic cells in new preeclampsia rat models will expand the information on the current situation., (Copyright © 2020 Elsevier Ltd. All rights reserved.)

Published
2020
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34. Synthesis and antioxidant activities of phenol derivatives from 1,6-bis(dimethoxyphenyl)hexane-1,6-dione.

Author

Artunc T, Menzek A, Taslimi P, Gulcin I, Kazaz C, and Sahin E

Subjects
Antioxidants chemical synthesis, Antioxidants pharmacology, Carbonic Anhydrase I antagonists & inhibitors, Carbonic Anhydrase II antagonists & inhibitors, Carbonic Anhydrase Inhibitors chemical synthesis, Carbonic Anhydrase Inhibitors pharmacology, Chemistry Techniques, Synthetic, Cholinesterase Inhibitors chemical synthesis, Cholinesterase Inhibitors pharmacology, Crystallography, X-Ray, Hexanones chemical synthesis, Hexanones pharmacology, Humans, Models, Molecular, Phenols chemical synthesis, Phenols pharmacology, Antioxidants chemistry, Carbonic Anhydrase Inhibitors chemistry, Cholinesterase Inhibitors chemistry, Hexanones chemistry, Phenols chemistry
Abstract

Starting from the compound (3,4-dimethoxyphenyl)(2-(3,4-dimethoxyphenyl)cyclopent-1-en-1-yl)methanone (4), two diols and three tetrol derivatives were synthesised. Morover, from the reactions of 1,3-dimethoxybenzene and 1,4-dimethoxybenzene with adipoyl chloride, fifteen new along with nine known compounds were obtained. For the characterizations of compounds, spectroscopic methods such as NMR including DEPT, COSY, HMQC and HMBC experiments and X-ray diffraction were used. The antioxidant activities of novel synthesized seventeen molecules were investigated by analytical methods like ABTS •+ and DPPH • scavenging. Also, reducing power these molecules were investigated by Fe 3+ , Cu 2+ , and [Fe 3+ -(TPTZ) 2 ] 3+ . Some of the molecules record powerful antioxidant profile when compared to putative standards. The inhibition effects of the phenols compounds against AChE and BChE activities were analysed. Also, these phenols were found as effective inhibitors for AChE, hCA I, hCA II, and BChE with K i s in the range of 122.95 ± 18.41-351.31 ± 69.12 nM for hCA I, 62.35 ± 9.03-363.17 ± 180.1 nM for hCA II, 134.57 ± 3.99-457.43 ± 220.10 nM for AChE, and 27.06 ± 9.12-72.98 ± 9.53 nM for BChE, respectively., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2020 Elsevier Inc. All rights reserved.)

Published
2020
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35. Investigation of endoplasmic reticulum stress and sonic hedgehog pathway in diabetic liver injury in mice.

Author

Sahinturk V, Kacar S, Sahin E, and Aykanat NEB

Subjects
Alanine Transaminase blood, Animals, Aspartate Aminotransferases blood, Blood Glucose analysis, Blotting, Western, Diabetes Mellitus, Experimental metabolism, Endoplasmic Reticulum Chaperone BiP, Liver metabolism, Liver pathology, Liver Diseases metabolism, Liver Diseases pathology, Male, Mice, Diabetes Mellitus, Experimental complications, Endoplasmic Reticulum Stress, Hedgehog Proteins metabolism, Liver Diseases etiology, Signal Transduction
Abstract

Aims: Diabetes is a common metabolic disease which damages many organs including the liver and causes endoplasmic reticulum (ER) stress, which originates from non-folded proteins. Sonic hedgehog (Shh) pathway plays a role in liver regeneration and repair. To our knowledge, there is no study showing the relation between ER stress and Shh pathway in the liver in diabetes. Thus, the aim of this study was to investigate the interaction between ER stress and Shh pathway in the liver of diabetic mice., Main Methods: Six groups of male mice were formed as control, diabetes (streptozotocine-treated), Shh activator (SAG-treated), Shh inhibitor (SANT1-treated), diabetes + SAG and diabetes + SANT1. At the end of the experiment, mice were weighed, anaesthetized and euthanized. Blood samples were collected, livers were excised and weighed. Thereafter, blood glucose, serum ALT and AST levels, TOS and TAC levels in liver tissue were measured. ER stress marker (GRP78) and Shh pathway molecules (Gli1 and Smo) were evaluated by immunohistochemistry, H-score and western blot analyses. Besides, histopathological examination was performed., Key Findings: Results showed that GRP78, Gli1 and Smo were increased in liver due to Type 1 diabetes. The SAG agent decreased GRP78 and increased Gli1 and Smo, leading to liver repair, while the inhibitor SANT1 increased GRP78 and decreased Gli1and Smo, causing progression of the liver stress induced by diabetes., Significance: In conclusion, the Shh pathway is related to ER stress and may provide a new strategy for its treatment, especially liver stress induced by diabetes., Competing Interests: Declaration of competing interest Authors declared that there is no conflict of interest., (Copyright © 2020 Elsevier Inc. All rights reserved.)

Published
2020
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36. Temperament predicts challenging behavior in children with autism spectrum disorder at age 5.

Author

Korbut S, Hedley D, Chetcuti L, Sahin E, and Nuske HJ

Abstract

Background: Challenging behaviors during early childhood have a significant impact on cognitive and social development. The present study aimed to identify the developmental predictors of these behaviors in preschool aged children with Autism Spectrum Disorder (ASD) at 2-year follow-up. We examined temperament, which has been identified as key to emotion regulation in typical development, as well as developmental level and ASD symptom severity, as potential predictors of parent-reported challenging behavior., Method: Forty-three parents of preschool aged children with ASD from a previous study were invited to participate. Data from 26 children with ASD aged 4-6 years ( M = 5, SD = .60) were available for follow-up analyses. Developmental level, ASD symptom severity, and temperamental difficulty at baseline were considered as potential predictors of frequency and severity of challenging behavior at follow-up., Results: Baseline negative affectivity was uniquely predictive of frequency of challenging behavior at follow-up. Although no individual variable was identified as a unique predictor of variance, the combined effects of temperament were predictive of the severity of challenging behavior at follow-up, contributing to 46 % of variance in scores., Conclusions: These findings highlight the potential impact of emotion-regulation related aspects of temperament on later emerging challenging behavior in young children with ASD, suggesting opportunities for early intervention. Results also identified a role for developmental level in the severity of challenging behavior, but suggest that the effect may be metered by temperament., Competing Interests: Declaration of Competing Interest SK declares that she has no conflict of interest. DH declares that he has no conflict of interest. LC declares that she has no conflict of interest. ES declares that she has no conflict of interest. HN declares that she has no conflict of interest.

Published
2020
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37. Chemical and physical instabilities in manufacturing and storage of therapeutic proteins.

Author

Krause ME and Sahin E

Subjects
Amino Acids, Methionine, Oxidation-Reduction, Proteins chemistry
Abstract

Development of a robust biologic drug product is accomplished by extensive formulation and process development screening studies; however, even in the most optimal formulation, a protein can undergo spontaneous degradation during manufacture, storage, and clinical use. Chemical changes to amino acid residues, such as oxidation of methionine or tryptophan, or changes in charge such as deamidation or carbonylation, can induce conformational changes in the overall protein structure, potentially leading to changes in physical - in addition to chemical - stability. Oxidation is often caused by light exposure or the presence of metal ions or peroxides. Asparagine deamidation is more likely to occur at higher pH and/or elevated temperature. Mechanical and interfacial stresses during manufacturing can lead to physical instabilities (i.e. various forms of aggregation). A well-defined manufacturing process and effective in-process controls are essential in minimizing chemical and physical instabilities, enabling robust production and distribution of a safe and efficacious drug product. In this work, the authors provide a review of developments in these areas over the past two years, with emphasis on manufacturability of therapeutically relevant proteins and protein-based drug products., (Copyright © 2019 Elsevier Ltd. All rights reserved.)

Published
2019
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38. Synthesis, biological evaluation and in silico modelling studies of 1,3,5-trisubstituted pyrazoles carrying benzenesulfonamide as potential anticancer agents and selective cancer-associated hCA IX isoenzyme inhibitors.

Author

Yamali C, Gul HI, Ece A, Bua S, Angeli A, Sakagami H, Sahin E, and Supuran CT

Subjects
Antineoplastic Agents chemical synthesis, Antineoplastic Agents chemistry, Carbonic Anhydrase IX metabolism, Carbonic Anhydrase Inhibitors chemical synthesis, Carbonic Anhydrase Inhibitors chemistry, Cell Proliferation drug effects, Cells, Cultured, Child, Dose-Response Relationship, Drug, Drug Screening Assays, Antitumor, Female, Humans, Isoenzymes antagonists & inhibitors, Isoenzymes metabolism, Models, Molecular, Molecular Structure, Pyrazoles chemical synthesis, Pyrazoles chemistry, Structure-Activity Relationship, Sulfonamides chemistry, Benzenesulfonamides, Antineoplastic Agents pharmacology, Carbonic Anhydrase IX antagonists & inhibitors, Carbonic Anhydrase Inhibitors pharmacology, Pyrazoles pharmacology, Sulfonamides pharmacology
Abstract

Inhibition of carbonic anhydrases (CAs, EC 4.2.1.1) has clinical importance for the treatment of several diseases. They participate in crucial regulatory mechanisms for balancing intracellular and extracellular pH of the cells. Among CA isoforms, selective inhibition of hCA IX has been linked to decreasing of cell growth for both primary tumors and metastases. The discovery of novel CA inhibitors as anticancer drug candidates is a current topic in medicinal chemistry. 1,3,5-Trisubstituted pyrazoles carrying benzenesulfonamide were evaluated against physiologically abundant cytosolic hCA I and hCA II and trans-membrane, tumor-associated hCA IX isoforms by a stopped-flow CO 2 hydrase method. Their in vitro cytotoxicities were screened against human oral squamous cell carcinoma (OSCC) cell lines (HSC-2) and human mesenchymal normal oral cells (HGF) via 3-(4,5-Dimethylthiazol-2-yl)-2,5-Diphenyltetrazolium Bromide (MTT) test. Compounds 6, 8, 9, 11, and 12 showed low nanomolar hCA II inhibitory potency with Ki < 10 nM, whereas compounds 9 and 12 displayed Ki < 10 nM against hCA IX isoenzyme when compared with reference Acetazolamide (AZA). Compound 9, 4-(3-(hydrazinecarbonyl)-5-(4-nitrophenyl)-1H-pyrazol-1-yl)benzenesulfonamide, can be considered as the most selective hCA IX inhibitor over off-target cytosolic isoenzymes hCA I and hCA II with the lowest Ki value of 2.3 nM and selectivity ratios of 3217 (hCA I/hCA IX) and 3.9 (hCA II/hCA IX). Isoform selectivity profiles were also discussed using in silico modelling. Cytotoxicity results pointed out that compounds 5 (CC 50  = 37.7 μM) and 11 (CC 50  = 58.1 μM) can be considered as lead cytotoxic compounds since they were more cytotoxic than 5-Fluorouracil (5-FU) and Methotrexate (MTX)., (Copyright © 2019 Elsevier Inc. All rights reserved.)

Published
2019
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39. Synthesis and biological evaluation of bromophenol derivatives with cyclopropyl moiety: Ring opening of cyclopropane with monoester.

Author

Boztas M, Taslimi P, Yavari MA, Gulcin I, Sahin E, and Menzek A

Subjects
Animals, Carbonic Anhydrase I isolation & purification, Carbonic Anhydrase I metabolism, Carbonic Anhydrase II isolation & purification, Carbonic Anhydrase II metabolism, Carbonic Anhydrase Inhibitors chemical synthesis, Carbonic Anhydrase Inhibitors chemistry, Cholinesterase Inhibitors chemical synthesis, Cholinesterase Inhibitors chemistry, Cyclopropanes chemistry, Cyclopropanes pharmacology, Dose-Response Relationship, Drug, Electrophorus, Esters chemistry, Esters pharmacology, Humans, Molecular Structure, Phenols chemical synthesis, Phenols chemistry, Phenols pharmacology, Structure-Activity Relationship, Acetylcholinesterase metabolism, Carbonic Anhydrase I antagonists & inhibitors, Carbonic Anhydrase II antagonists & inhibitors, Carbonic Anhydrase Inhibitors pharmacology, Cholinesterase Inhibitors pharmacology
Abstract

Trans-(1R*,2R*,3R*)-Ethyl 2-(3,4-dimethoxyphenyl)-3-methylcyclopropane-1-carboxylate (6) and its cis isomer 7 were obtained from the reaction of the methyl isoeugenol (5) with ethyl diazoacetate. The reduction and bromination reactions of the ester 6 and 7 together with the hydrolysis of all esters were carried out. Opening ring of cyclopropane was observed in the reaction of 7 with bromine. The opening of cyclopropane ring with COOR and synthesis of esters, alcohols and acids (6-26) are new. These obtained bromophenol derivatives (6-26) were effective inhibitors of the cytosolic carbonic anhydrase I and II isoforms (hCA I and II) and acetylcholinesterase (AChE) enzymes with Ki values in the range of 7.8 ± 0.9-58.3 ± 10.3 nM for hCA I, 43.1 ± 16.7-150.2 ± 24.1 nM for hCA II, and 159.6 ± 21.9-924.2 ± 104.8 nM for AChE, respectively. Acetylcholinesterase inhibitors are the most popular drugs applied in the treatment of diseases such as Alzheimer's disease, Parkinson's disease, senile dementia, and ataxia, among others., (Copyright © 2019 Elsevier Inc. All rights reserved.)

Published
2019
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40. Giant Extrarenal Retroperitoneal Angiomyolipoma: A Rare Case of a Large Size Tumor.

Author

Ozturk S, Unver M, Onen Z, Ozturk H, Sahin E, Ortac R, and Sozbilen EM

Subjects
Angiomyolipoma diagnostic imaging, Angiomyolipoma surgery, Female, Humans, Middle Aged, Nephrectomy, Retroperitoneal Neoplasms diagnostic imaging, Retroperitoneal Neoplasms surgery, Tomography, X-Ray Computed, Treatment Outcome, Angiomyolipoma pathology, Retroperitoneal Neoplasms pathology
Published
2018
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41. Is the Abramson technique effective in pectus carinatum repair?

Author

Katrancioglu O, Akkas Y, Karadayi S, Sahin E, and Kaptanoğlu M

Subjects
Adolescent, Child, Female, Follow-Up Studies, Humans, Male, Postoperative Complications epidemiology, Retrospective Studies, Treatment Outcome, Young Adult, Minimally Invasive Surgical Procedures methods, Orthopedic Procedures methods, Pectus Carinatum surgery
Abstract

Background: The minimally invasive pectus carinatum (PC) surgery described by Abramson has been performed in many centers. We have been using this technique since 2011. This article describes our experience with PC correction., Methods: Between 2011 and 2016, 32 patients at our institution underwent minimally invasive repair of a PC deformity. All patients presented with cosmetic complaints. The deformity involved the lower sternum (all had chondrogladiolar type PC), and three patients had asymmetrical deformities. All operations followed the principles defined by Abramson., Results: Satisfactory esthetic results were achieved in our patients. The hospital stay averaged 5.3 days (range 4-7 days). The most common early complication was pneumothorax, and the most common late complication was wire suture breakage., Conclusion: The Abramson technique is an effective, minimally invasive procedure for PC with shorter operating and hospitalization times and low morbidity rates., (Copyright © 2016. Published by Elsevier Taiwan.)

Published
2018
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42. Relationship Among Pulmonary Hypertension, Autoimmunity, Thyroid Hormones and Dyspnea in Patients With Hyperthyroidism.

Author

Zuhur SS, Baykiz D, Kara SP, Sahin E, Kuzu I, and Elbuken G

Subjects
Adult, Female, Humans, Hypertension, Pulmonary diagnostic imaging, Male, Middle Aged, Autoimmunity, Dyspnea complications, Hypertension, Pulmonary complications, Hyperthyroidism complications, Thyroid Hormones blood
Abstract

Objective: Previous studies have reported conflicting results regarding the mechanisms underlying the pathophysiology of pulmonary hypertension (PHT) in patients with hyperthyroidism. Therefore, in this study, we investigated the association between PHT and thyroid-stimulating hormone (TSH) receptor antibody, thyroid peroxidase antibody, thyroglobulin antibody, TSH, fT3, fT4 and dyspnea during daily activities in a large population of patients with hyperthyroidism., Methods: A total of 129 consecutive patients with hyperthyroidism, 37 with hypothyroidism and 38 euthyroid controls were enrolled in this study. The modified medical research council scale was used for the assessment of dyspnea in daily activities. All the patients and euthyroid controls underwent transthoracic echocardiography for the assessment of PHT., Results: Mild PHT was present in 35%, 36%, 13.5% and 5% of the patients with Graves׳ disease, toxic multinodular goiter, hypothyroidism and euthyroid controls, respectively. Pulmonary vascular resistance (PVR) was higher in hyperthyroid patients with PHT than in those without PHT. Moreover, a significant positive correlation was found between modified medical research council scale and pulmonary artery systolic pressure as well as PVR in patients with hyperthyroidism. No association was found between PHT and serum TSH receptor antibody, thyroid peroxidase antibody, thyroglobulin antibody, TSH, fT3 and fT4 levels., Conclusions: Mild PHT is present in a significant proportion of patients with hyperthyroidism, regardless of etiology. PVR appears to be the main cause of PHT in patients with hyperthyroidism, and neither autoimmunity nor thyroid hormones are associated with PHT in these patients. Mild dyspnea during daily activities in patients with hyperthyroidism may be related to PHT; however, severe dyspnea requires further evaluation., (Copyright © 2017 Southern Society for Clinical Investigation. Published by Elsevier Inc. All rights reserved.)

Published
2017
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43. Parricide cases of adult offenders from Turkey: A descriptive study.

Author

Sahin E, Sahin MF, Tavasli A, Gul MC, Seyhan OF, Demirbuga S, and Aliustaoglu FS

Subjects
Adolescent, Adult, Fathers statistics & numerical data, Female, Forensic Psychiatry, Humans, Male, Mental Disorders epidemiology, Middle Aged, Mothers statistics & numerical data, Retrospective Studies, Turkey epidemiology, Wounds, Stab mortality, Young Adult, Homicide statistics & numerical data
Abstract

The aim of this study was to examine and compare similarities and differences among types of parricide committed by adult offenders. The forensic psychiatric evaluation reports of the 4th Specialization Board of the Council of Forensic Medicine from 2009 to 2011 in Turkey were screened retrospectively. One hundred thirty-five adult perpetrators of parricide (125 male, 10 female) were detected, 51.9% of whom committed patricide, 40% of whom matricide and 8.1% of the perpetrators committed double parricide. Most of the perpetrators used sharp instruments as the killing method. No mental disorders were detected in 58.5% of the perpetrators, while psychotic disorders were identified in 30.4% of the cases. This study supported the predominance of sharp instruments as the killing method and a preponderance of matricide among the offenders with psychotic disorders. Although psychotic disorders were the most commonly detected mental disorders in the parricide offenders, most of them did not suffer from mental disorders., (Copyright © 2016 Elsevier Ltd and Faculty of Forensic and Legal Medicine. All rights reserved.)

Published
2016
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45. 24-nor-ursodeoxycholic acid ameliorates inflammatory response and liver fibrosis in a murine model of hepatic schistosomiasis.

Author

Sombetzki M, Fuchs CD, Fickert P, Österreicher CH, Mueller M, Claudel T, Loebermann M, Engelmann R, Langner C, Sahin E, Schwinge D, Guenther ND, Schramm C, Mueller-Hilke B, Reisinger EC, and Trauner M

Subjects
Animals, Cholagogues and Choleretics metabolism, Cholagogues and Choleretics pharmacology, Disease Models, Animal, Drug Monitoring, Immunohistochemistry, Inflammation drug therapy, Inflammation immunology, Inflammation pathology, Lymphocyte Activation drug effects, Mice, T-Lymphocytes drug effects, T-Lymphocytes immunology, Treatment Outcome, Ursodeoxycholic Acid metabolism, Ursodeoxycholic Acid pharmacology, Granuloma drug therapy, Granuloma immunology, Granuloma pathology, Liver Cirrhosis drug therapy, Liver Cirrhosis etiology, Liver Cirrhosis immunology, Liver Cirrhosis pathology, Liver Cirrhosis physiopathology, Schistosomiasis mansoni complications, Schistosomiasis mansoni immunology, Schistosomiasis mansoni pathology, Schistosomiasis mansoni physiopathology, Ursodeoxycholic Acid analogs & derivatives
Abstract

Background & Aims: Intrahepatic granuloma formation and fibrosis characterize the pathological features of Schistosoma mansoni infection. Based on previously observed substantial anti-fibrotic effects of 24-nor-ursodeoxycholic acid (norUDCA) in Abcb4/Mdr2(-/-) mice with cholestatic liver injury and biliary fibrosis, we hypothesized that norUDCA improves inflammation-driven liver fibrosis in S. mansoni infection., Methods: Adult NMRI mice were infected with 50 S. mansoni cercariae and after 12 weeks received either norUDCA- or ursodeoxycholic acid (UDCA)-enriched diet (0.5% wt/wt) for 4 weeks. Bile acid effects on liver histology, serum biochemistry, key regulatory cytokines, hepatic hydroxyproline content as well as granuloma formation were compared to naive mice and infected controls. In addition, effects of norUDCA on primary T-cell activation/proliferation and maturation of the antigen-presenting-cells (dendritic cells, macrophages) were determined in vitro., Results: UDCA as well as norUDCA attenuated the inflammatory response in livers of S. mansoni infected mice, but exclusively norUDCA changed cellular composition and reduced size of hepatic granulomas as well as TH2-mediated hepatic fibrosis in vivo. Moreover, norUDCA affected surface expression level of major histocompatibility complex (MHC) class II of macrophages and dendritic cells as well as activation/proliferation of T-lymphocytes in vitro, whereas UDCA had no effect., Conclusions: This study demonstrates pronounced anti-inflammatory and anti-fibrotic effects of norUDCA compared to UDCA in S. mansoni induced liver injury, and indicates that norUDCA directly represses antigen presentation of antigen presenting cells and subsequent T-cell activation in vitro. Therefore, norUDCA represents a promising drug for the treatment of this important cause of liver fibrosis., (Copyright © 2014 European Association for the Study of the Liver. Published by Elsevier B.V. All rights reserved.)

Published
2015
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46. Synthesis, aggregation and spectroscopic studies of novel water soluble metal free, zinc, copper and magnesium phthalocyanines and investigation of their anti-bacterial properties.

Author

Bayrak R, Akçay HT, Beriş FŞ, Sahin E, Bayrak H, and Demirbaş Ü

Subjects
Anti-Bacterial Agents pharmacology, Bacteria drug effects, Bacterial Infections drug therapy, Copper pharmacology, Crystallography, X-Ray, Humans, Indoles pharmacology, Isoindoles, Magnesium pharmacology, Models, Molecular, Organometallic Compounds pharmacology, Solubility, Water chemistry, Zinc pharmacology, Anti-Bacterial Agents chemistry, Copper chemistry, Indoles chemistry, Magnesium chemistry, Organometallic Compounds chemistry, Zinc chemistry
Abstract

In this study, novel phthalonitrile derivative (3) was synthesized by the reaction between 4-nitrophthalonitrile (2) and a triazole derivative (1) containing pyridine moiety. Crystal structure of compound (3) was characterized by X-ray diffraction. New metal free and metallo-phthalocyanine complexes (Zn, Cu, and Mg) were synthesized using the phthalonitrile derivative (3). Cationic derivatives of these phthalocyanines (5, 7, 9, and 11) were prepared from the non-ionic phthalocyanines (4, 6, 8, and 10). All proposed structures were supported by instrumental methods. The aggregation behaviors of the phthalocyanines (4-11) were investigated in different solvents such as dimethylsulfoxide (DMSO), N,N-dimethylformamide (DMF), chloroform and water. Water soluble cationic Pcs (5, 7, 9, and 11) aggregated in water and sodium dodecyl sulfate was used to prevent the aggregation. The second derivatives of the UV-Vis spectra of aggregated Pcs were used for analyzing the Q and B bands of aggregated species. Thermal behaviors of the phthalocyanines were also studied. In addition, anti-bacterial properties of the phthalocyanines were investigated. We used four gram negative and two gram positive bacteria to determine antibacterial activity of these compounds. Compound 7 has the best activity against the all bacteria with 125μg/mL of MIC value. Compounds 4, 6, and 10 have the similar effect on the bacteria with 250μg/mL of MIC value., (Copyright © 2014 Elsevier B.V. All rights reserved.)

Published
2014
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47. Ruthenium (II) complexes of thiosemicarbazone: synthesis, biosensor applications and evaluation as antimicrobial agents.

Author

Yildirim H, Guler E, Yavuz M, Ozturk N, Kose Yaman P, Subasi E, Sahin E, and Timur S

Subjects
Anti-Bacterial Agents pharmacology, Antifungal Agents pharmacology, Electrochemical Techniques, Fungi drug effects, Glucose Oxidase chemistry, Gram-Negative Bacteria drug effects, Gram-Positive Bacteria drug effects, Magnetic Resonance Spectroscopy, Molecular Conformation, Spectroscopy, Fourier Transform Infrared, Anti-Bacterial Agents chemistry, Antifungal Agents chemistry, Biosensing Techniques, Ruthenium chemistry, Thiosemicarbazones chemistry
Abstract

A conformationally rigid half-sandwich organoruthenium (II) complex [(η(6)-p-cymene)RuClTSC(N-S)]Cl, (1) and carbonyl complex [Ru(CO)Cl(PPh3)2TSC(N-S)] (2) have been synthesized from the reaction of [{(η(6)-p-cymene)RuCl}2(μ-Cl)2] and [Ru(H)(Cl)(CO)(PPh3)3] with thiophene-2-carboxaldehyde thiosemicarbazon (TSC) respectively and both novel ruthenium (II) complexes have been characterized by elemental analysis, FT-IR and NMR spectroscopy. The peripheral TSC in the complexes acts as an electrochemical coupling unit providing the ability to carry out electrochemical deposition (ED) and to form an electro-deposited film on a graphite electrode surface. The biosensing applicability of complexes 1 and 2 was investigated by using glucose oxidase (GOx) as a model enzyme. Electrochemical measurements at -0.9V versus Ag/AgCl electrode by following the ED Ru(II) reduction/oxidation due to from the enzyme activity, in the presence of glucose substrate. The designed biosensor showed a very good linearity for 0.01-0.5mM glucose. The in vitro antimicrobial activities of complexes 1 and 2 were also investigated against nine bacterial strains and one fungus by the disc diffusion test method. No activity was observed against the Gram-negative strains and fungus, whereas complex 1 showed moderate antibacterial activities against Gram-positive bacterial strains., (Copyright © 2014 Elsevier B.V. All rights reserved.)

Published
2014
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48. Rapamycin inhibits oxidative and angiogenic mediators in diabetic retinopathy.

Author

Ozdemir G, Kılınç M, Ergün Y, and Sahin E

Subjects
Animals, Diabetes Mellitus, Experimental drug therapy, Eye Proteins metabolism, Hypoxia-Inducible Factor 1, alpha Subunit metabolism, Male, Malondialdehyde metabolism, Nerve Growth Factors metabolism, Rats, Rats, Wistar, Serpins metabolism, Tyrosine analogs & derivatives, Tyrosine metabolism, Vascular Endothelial Growth Factor A metabolism, Angiogenesis Modulating Agents metabolism, Anti-Bacterial Agents pharmacology, Diabetic Retinopathy drug therapy, Oxidative Stress drug effects, Sirolimus pharmacology
Abstract

Objective: To evaluate the role of rapamycin in the prevention of diabetic oxidative stress and the regulation of angiogenic factors., Design: Experimental animal study., Methods: Diabetes was induced in 20 adult male Wistar rats by a single intraperitoneal administration of streptozotocin (60 mg/kg). Rats were randomly assigned into diabetic and rapamycin groups (n = 10). Ten healthy normal adult male rats of same age formed the control group. All groups were followed for 3 months. Rapamycin group received 1 mg/kg rapamycin via orogastric gavage during the last 4 weeks. At the end of 12 weeks, rats were sacrificed and biochemical oxidative stress markers (malondialdehyde and nitrotyrosine), together with vascular endothelial growth factor, hypoxia-inducible factor-1α, and pigment epithelium-derived factor, were measured in the retina. Blood biochemical analyses were also done., Results: In the diabetic group, retinal malondialdehyde and nitrotyrosine levels were increased in comparison with control and rapamycin groups (p < 0.05). Rapamycin suppressed oxidative stress and showed a beneficial effect. It also decreased all angiomodulator cytokines compared with the diabetic group (p < 0.05). Correspondingly, rapamycin also decreased plasma malondialdehyde levels compared with the diabetic group (p = 0.037)., Conclusions: Rapamycin may have a protective role against diabetes-induced oxidative retinal injury and may decrease angiomodulator cytokines., (Copyright © 2014 Canadian Ophthalmological Society. Published by Elsevier Inc. All rights reserved.)

Published
2014
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49. Synthesis, characterization and vibrational spectra analysis of ethyl (2Z)-2-(2-amino-4-oxo-1,3-oxazol-5(4H)-ylidene)-3-oxo-3-phenylpropanoate.

Author

Kıbrız IE, Sert Y, Saçmacı M, Sahin E, Yıldırım I, and Ucun F

Subjects
Amination, Models, Molecular, Oxazoles chemistry, Quantum Theory, Spectroscopy, Fourier Transform Infrared, Spectrum Analysis, Raman, X-Ray Diffraction, Phenylpropionates chemistry
Abstract

In the present study, the experimental and theoretical vibrational spectra of ethyl (2Z)-2-(2-amino-4-oxo-1,3-oxazol-5(4H)-ylidene)-3-oxo-3-phenylpropanoate (AOX) were investigated. The experimental FT-IR (400-4000 cm(-1)) and Laser-Raman spectra (100-4000 cm(-1)) of the molecule in the solid phase were recorded. Theoretical vibrational frequencies and geometric parameters (bond lengths, bond angles and torsion angles) were calculated using ab initio Hartree Fock (HF), Density Functional Theory (B3LYP and B3PW91) methods with 6-311++G(d,p) basis set by Gaussian 03 program, for the first time. The computed values of frequencies are scaled using a suitable scale factor to yield good coherence with the observed values. The assignments of the vibrational frequencies were performed by potential energy distribution (PED) analysis by using VEDA 4 program. The theoretical optimized geometric parameters and vibrational frequencies were compared with the corresponding experimental X-ray diffraction data, and they were seen to be in a good agreement with each other. The hydrogen bonding geometry of the molecule was also simulated to evaluate the effect of intermolecular hydrogen bonding on the vibrational frequencies. Also, the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energies were found., (Published by Elsevier B.V.)

Published
2013
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50. Experimental and computational studies on 4-[(3,5-dimethyl-1H-pyrazol-1-yl)methoxy]phthalonitrile and synthesis and spectroscopic characterization of its novel phthalocyanine magnesium(II) and tin(II) metal complexes.

Author

Akçay HT, Bayrak R, Sahin E, Karaoğlu K, and Demirbaş U

Subjects
Coordination Complexes chemical synthesis, Indoles chemical synthesis, Isoindoles, Magnetic Resonance Spectroscopy, Methylation, Models, Molecular, Quantum Theory, Coordination Complexes chemistry, Indoles chemistry, Magnesium chemistry, Nitriles chemistry, Pyrazoles chemistry, Tin chemistry
Abstract

The molecular structure of the substituted phthalonitrile was analyzed crystallographically and compared with optimized geometric structure. The structural properties of the compound such as energy, vibrational frequency, ground state transitions, (1)H and (13)C NMR chemical shifts, NBO analysis and hyperpolarizability were computed by DFT (Density Functional Theory) method and compared with experimental results. The novel Mg(II) and Sn(II) phthalocyanines synthesized from the substituted phthalonitrile and their aggregation behaviors were investigated in different solvents and at different concentrations in DMSO., (Copyright © 2013 Elsevier B.V. All rights reserved.)

Published
2013
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