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Start Over Author "Becker F." Journal physics letters b
21 results on '"Becker F."'

1. Lifetime measurements in 80Br and a new region for observation of chiral electromagnetic selection rules

Author

Guo, R.J., primary, Wang, S.Y., additional, Schwengner, R., additional, Xu, W.Z., additional, Qi, B., additional, Liu, C., additional, Rohilla, A., additional, Dönau, F., additional, Servene, T., additional, Schnare, H., additional, Reif, J., additional, Winter, G., additional, Käubler, L., additional, Prade, H., additional, Skoda, S., additional, Eberth, J., additional, Thomas, H.G., additional, Becker, F., additional, Fiedler, B., additional, Freund, S., additional, Kasemann, S., additional, Steinhardt, T., additional, Thelen, O., additional, Härtlein, T., additional, Ender, C., additional, Köck, F., additional, Reiter, P., additional, and Schwalm, D., additional

Published
2022
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2. Lifetime measurements in 80Br and a new region for observation of chiral electromagnetic selection rules

Author

Guoa, R. J., Wang, S. Y., Schwengner, R., Xu, W. Z., Qi, B., Liu, C., Rohilla, A., Dönau, F., Servene, T., Schnare, H., Reif, J., Winter, G., Käubler, L., Prade, H., Skoda, S., Eberth, J., Thomas, H. G., Becker, F., Fiedler, B., Freund, S., Kasemann, S., Steinhardt, T., Thelen, O., Härtlein, T., Ender, C., Köck, F., Reiter, P., and Schwalm, D.

Subjects
Technology, Nuclear and High Energy Physics, Chiral bands, Lifetime measurement, Chiral doublet bands, Transition probability, Level lifetime measurements, Nuclear Structure, Transition probabilities, ddc:600, Particle rotor model
Abstract

Level lifetimes for the candidate chiral doublet bands of 80 Br were extracted by means of the Doppler-shift attenuation method. The absolute transition probabilities derived from the lifetimes agree well with the M 1 and E2 chiral electromagnetic selection rules, and the calculations reported in the frame- work of triaxial particle rotor model [S.Y. Wang et al., Phys. Lett. B 703 (2011) 40] also support firmly for the chirality in 80 Br. Such good agree- ments among the experimental data, selection rules of chiral doublet bands and theoretical calculations are rare and outstanding in researches of nuclear chirality. Besides odd-odd Cs isotopes, odd-odd Br isotopes in the A ≈ 80 mass region represent another territory that exhibits the ideal selection rules expected for chiral doublet bands.

Published
2022

3. g Factor of the 7− isomer in 126Sn and first observation of spin-alignment in relativistic fission

Author

Ilie, G., Neyens, G., Simpson, G.S., Jolie, J., Blazhev, A., Grawe, H., Lozeva, R.L., Vermeulen, N., Atanasova, L., Balabanski, D.L., Becker, F., Bednarczyk, P., Brandau, C., Caceres, L., Chamoli, S.K., Daugas, J.M., Doornenbal, P., Gerl, J., Górska, M., Grȩbosz, J., Hass, M., Ionescu-Bujor, M., Jungclaus, A., Kmiecik, M., Kojouharov, I., Kurz, N., Maj, A., Mallion, S., Perru, O., Pfützner, M., Podolyák, Zs., Prokopowicz, W., De Rydt, M., Saito, T.R., Schaffner, H., Turzó, K., Walker, J., Werner-Malento, E., and Wollersheim, H.J.

Subjects
Nuclear and High Energy Physics
Published
2010
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4. Neutron–proton pairing competition in N=Z nuclei: Metastable state decays in the proton dripline nuclei 8241Nb and 8643Tc

Author

Garnsworthy, A.B., Regan, P.H., Cáceres, L., Pietri, S., Sun, Y., Rudolph, D., Górska, M., Podolyák, Zs., Steer, S.J., Hoischen, R., Heinz, A., Becker, F., Bednarczyk, P., Doornenbal, P., Geissel, H., Gerl, J., Grawe, H., Grȩbosz, J., Kelic, A., Kojouharov, I., Kurz, N., Montes, F., Prokopowicz, W., Saito, T., Schaffner, H., Tachenov, S., Werner-Malento, E., Wollersheim, H.J., Benzoni, G., Blank, B.B., Brandau, C., Bruce, A.M., Camera, F., Catford, W.N., Cullen, I.J., Dombrádi, Zs., Estevez, E., Gelletly, W., Ilie, G., Jolie, J., Jones, G.A., Jungclaus, A., Kmiecik, M., Kondev, F.G., Kurtukian-Nieto, T., Lalkovski, S., Liu, Z., Maj, A., Myalski, S., Pfützner, M., Schwertel, S., Shizuma, T., Simons, A.J., Walker, P.M., Wieland, O., and Xu, F.R.

Subjects
Nuclear and High Energy Physics
Published
2008
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5. Yrast and non-yrast 2+ states of 134Ce and 136Nd populated in relativistic Coulomb excitation

Author

Saito, T.R., Saito, N., Starosta, K., Beller, J., Pietralla, N., Wollersheim, H.J., Balabanski, D.L., Banu, A., Bark, R.A., Beck, T., Becker, F., Bednarczyk, P., Behr, K.-H., Benzoni, G., Bizzeti, P.G., Boiano, C., Bracco, A., Brambilla, S., Brünle, A., Bürger, A., Caceres, L., Camera, F., Crespi, F.C.L., Doornenbal, P., Garnsworthy, A.B., Geissel, H., Gerl, J., Górska, M., Grebosz, J., Hagemann, G., Jolie, J., Kavatsyuk, M., Kavatsyuk, O., Koike, T., Kojouharov, I., Kurz, N., Leske, J., Lo Bianco, G., Maj, A., Mallion, S., Mandal, S., Maliage, M., Otsuka, T., Petrache, C.M., Podolyak, Zs., Prokopowicz, W., Rainovski, G., Reiter, P., Richard, A., Schaffner, H., Schielke, S., Sletten, G., Thompson, N.J., Tonev, D., Walker, J., Warr, N., Wieland, O., and Zhong, Q.

Published
2008
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6. The [formula omitted] mirrors 36Ca and 36S: A test for isospin symmetry of shell gaps at the driplines

Author

Doornenbal, P., Reiter, P., Grawe, H., Otsuka, T., Al-Khatib, A., Banu, A., Beck, T., Becker, F., Bednarczyk, P., Benzoni, G., Bracco, A., Bürger, A., Caceres, L., Camera, F., Chmel, S., Crespi, F.C.L., Geissel, H., Gerl, J., Górska, M., Grȩbosz, J., Hübel, H., Kavatsyuk, M., Kavatsyuk, O., Kmiecik, M., Kojouharov, I., Kurz, N., Lozeva, R., Maj, A., Mandal, S., Meczynski, W., Million, B., Podolyák, Zs., Richard, A., Saito, N., Saito, T., Schaffner, H., Seidlitz, M., Striepling, T., Utsuno, Y., Walker, J., Warr, N., Weick, H., Wieland, O., Winkler, M., and Wollersheim, H.J.

Published
2007
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7. Erratum to: “Neutron–proton pairing competition in N=Z nuclei: Metastable state decays in the proton dripline nuclei 8241Nb and 8643Tc” [Phys. Lett. B 660 (2008) 326]

Author

Garnsworthy, A.B., primary, Regan, P.H., additional, Cáceres, L., additional, Pietri, S., additional, Sun, Y., additional, Rudolph, D., additional, Górska, M., additional, Podolyák, Zs., additional, Steer, S.J., additional, Hoischen, R., additional, Heinz, A., additional, Becker, F., additional, Bednarczyk, P., additional, Doornenbal, P., additional, Geissel, H., additional, Gerl, J., additional, Grawe, H., additional, Grȩbosz, J., additional, Kelic, A., additional, Kojouharov, I., additional, Kurz, N., additional, Montes, F., additional, Prokopowicz, W., additional, Saito, T., additional, Schaffner, H., additional, Tachenov, S., additional, Werner-Malento, E., additional, Wollersheim, H.J., additional, Benzoni, G., additional, Blank, B.B., additional, Brandau, C., additional, Bruce, A.M., additional, Camera, F., additional, Catford, W.N., additional, Cullen, I.J., additional, Dombrádi, Zs., additional, Estevez, E., additional, Gelletly, W., additional, Ilie, G., additional, Jolie, J., additional, Jones, G.A., additional, Jungclaus, A., additional, Kmiecik, M., additional, Kondev, F.G., additional, Kurtukian-Nieto, T., additional, Lalkovski, S., additional, Liu, Z., additional, Maj, A., additional, Myalski, S., additional, Pfützner, M., additional, Schwertel, S., additional, Shizuma, T., additional, Simons, A.J., additional, Walker, P.M., additional, Wieland, O., additional, and Xu, F.R., additional

Published
2008
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8. The T=2 mirrors 36Ca and 36S: A test for isospin symmetry of shell gaps at the driplines

Author

Doornenbal, P., primary, Reiter, P., additional, Grawe, H., additional, Otsuka, T., additional, Al-Khatib, A., additional, Banu, A., additional, Beck, T., additional, Becker, F., additional, Bednarczyk, P., additional, Benzoni, G., additional, Bracco, A., additional, Bürger, A., additional, Caceres, L., additional, Camera, F., additional, Chmel, S., additional, Crespi, F.C.L., additional, Geissel, H., additional, Gerl, J., additional, Górska, M., additional, Grȩbosz, J., additional, Hübel, H., additional, Kavatsyuk, M., additional, Kavatsyuk, O., additional, Kmiecik, M., additional, Kojouharov, I., additional, Kurz, N., additional, Lozeva, R., additional, Maj, A., additional, Mandal, S., additional, Meczynski, W., additional, Million, B., additional, Podolyák, Zs., additional, Richard, A., additional, Saito, N., additional, Saito, T., additional, Schaffner, H., additional, Seidlitz, M., additional, Striepling, T., additional, Utsuno, Y., additional, Walker, J., additional, Warr, N., additional, Weick, H., additional, Wieland, O., additional, Winkler, M., additional, and Wollersheim, H.J., additional

Published
2007
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9. High angular momentum states populated in fragmentation reactions

Author

Podolyák, Zs., primary, Gerl, J., additional, Hellström, M., additional, Becker, F., additional, Gladnishki, K.A., additional, Górska, M., additional, Kelić, A., additional, Kopatch, Y., additional, Mandal, S., additional, Regan, P.H., additional, Schmidt, K.-H., additional, Walker, P.M., additional, Wollersheim, H.J., additional, Banu, A., additional, Benzoni, G., additional, Boardman, H., additional, Casarejos, E., additional, Ekman, J., additional, Geissel, H., additional, Grawe, H., additional, Hohn, D., additional, Kojouharov, I., additional, Leske, J., additional, Lozeva, R., additional, Mineva, M.N., additional, Neyens, G., additional, Page, R.D., additional, Pearson, C.J., additional, Portillo, M., additional, Rudolph, D., additional, Saito, N., additional, Schaffner, H., additional, Sohler, D., additional, Sümmerer, K., additional, Valiente-Dobón, J.J., additional, Wheldon, C., additional, Weick, H., additional, and Winkler, M., additional

Published
2006
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10. Relativistic Coulomb excitation of neutron-rich 54,56,58Cr: On the pathway of magicity from N=40 to N=32

Author

Bürger, A., primary, Saito, T.R., additional, Grawe, H., additional, Hübel, H., additional, Reiter, P., additional, Gerl, J., additional, Górska, M., additional, Wollersheim, H.J., additional, Al-Khatib, A., additional, Banu, A., additional, Beck, T., additional, Becker, F., additional, Bednarczyk, P., additional, Benzoni, G., additional, Bracco, A., additional, Brambilla, S., additional, Bringel, P., additional, Camera, F., additional, Clément, E., additional, Doornenbal, P., additional, Geissel, H., additional, Görgen, A., additional, Grębosz, J., additional, Hammond, G., additional, Hellström, M., additional, Honma, M., additional, Kavatsyuk, M., additional, Kavatsyuk, O., additional, Kmiecik, M., additional, Kojouharov, I., additional, Korten, W., additional, Kurz, N., additional, Lozeva, R., additional, Maj, A., additional, Mandal, S., additional, Million, B., additional, Muralithar, S., additional, Neußer, A., additional, Nowacki, F., additional, Otsuka, T., additional, Podolyák, Zs., additional, Saito, N., additional, Singh, A.K., additional, Weick, H., additional, Wheldon, C., additional, Wieland, O., additional, and Winkler, M., additional

Published
2005
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11. Delayed alignment in the N = Z nucleus 72Kr

Author

de Angelis, G., primary, Fahlander, C., additional, Gadea, A., additional, Farnea, E., additional, Gelletly, W., additional, Aprahamian, A., additional, Bazzacco, D., additional, Becker, F., additional, Bizzeti, P.G., additional, Bizzeti-Sona, A., additional, Brandolini, F., additional, de Acuña, D., additional, De Poli, M., additional, Eberth, J., additional, Foltescu, D., additional, Lenzi, S.M., additional, Lunardi, S., additional, Martinez, T., additional, Napoli, D.R., additional, Pavan, P., additional, Petrache, C.M., additional, Rossi Alvarez, C., additional, Rudolph, D., additional, Rubio, B., additional, Satula, W., additional, Skoda, S., additional, Spolaore, P., additional, Thomas, H.G., additional, Ur, C.A., additional, and Wyss, R., additional

Published
1997
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12. Neutron–proton pairing competition in N=Z nuclei: Metastable state decays in the proton dripline nuclei 8241Nb and 8643Tc

Author

Garnsworthy, A.B., Regan, P.H., Cáceres, L., Pietri, S., Sun, Y., Rudolph, D., Górska, M., Podolyák, Zs., Steer, S.J., Hoischen, R., Heinz, A., Becker, F., Bednarczyk, P., Doornenbal, P., Geissel, H., Gerl, J., Grawe, H., Grȩbosz, J., Kelic, A., Kojouharov, I., Kurz, N., Montes, F., Prokopowicz, W., Saito, T., Schaffner, H., Tachenov, S., Werner-Malento, E., Wollersheim, H.J., Benzoni, G., Blank, B.B., Brandau, C., Bruce, A.M., Camera, F., Catford, W.N., Cullen, I.J., Dombrádi, Zs., Estevez, E., Gelletly, W., Ilie, G., Jolie, J., Jones, G.A., Jungclaus, A., Kmiecik, M., Kondev, F.G., Kurtukian-Nieto, T., Lalkovski, S., Liu, Z., Maj, A., Myalski, S., Pfützner, M., Schwertel, S., Shizuma, T., Simons, A.J., Walker, P.M., Wieland, O., and Xu, F.R.

Subjects
Nuclear Theory, Nuclear Experiment
Abstract

The low-lying structures of the self-conjugate (N=Z) nuclei 8241Nb41 and 8643Tc43 have been investigated using isomeric-decay spectroscopy following the projectile fragmentation of a 107Ag beam. These represent the heaviest odd–odd N=Z nuclei in which internal decays have been identified to date. The resulting level schemes shed light on the shape evolution along the N=Z line between the doubly-magic systems 5628Ni and 10050Sn and support a preference for T=1 states in Tz=0 odd–odd nuclei at low excitation energies associated with a T=1 neutron–proton pairing gap. Comparison with Projected Shell Model calculations suggests that the decay in 82Nb may be interpreted as an isospin-changing K isomer.

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13. Erratum to: “Neutron–proton pairing competition in [formula omitted] nuclei: Metastable state decays in the proton dripline nuclei 8241Nb and 8643Tc” [Phys. Lett. B 660 (2008) 326]

Author

Garnsworthy, A.B., Regan, P.H., Cáceres, L., Pietri, S., Sun, Y., Rudolph, D., Górska, M., Podolyák, Zs., Steer, S.J., Hoischen, R., Heinz, A., Becker, F., Bednarczyk, P., Doornenbal, P., Geissel, H., Gerl, J., Grawe, H., Grȩbosz, J., Kelic, A., Kojouharov, I., Kurz, N., Montes, F., Prokopowicz, W., Saito, T., Schaffner, H., Tachenov, S., Werner-Malento, E., Wollersheim, H.J., Benzoni, G., Blank, B.B., Brandau, C., Bruce, A.M., Camera, F., Catford, W.N., Cullen, I.J., Dombrádi, Zs., Estevez, E., Gelletly, W., Ilie, G., Jolie, J., Jones, G.A., Jungclaus, A., Kmiecik, M., Kondev, F.G., Kurtukian-Nieto, T., Lalkovski, S., Liu, Z., Maj, A., Myalski, S., Pfützner, M., Schwertel, S., Shizuma, T., Simons, A.J., Walker, P.M., Wieland, O., and Xu, F.R.

Published
2008
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15. Delayed [formula omitted] alignment in the N = Z nucleus 72Kr

Author

de Angelis, G., Fahlander, C., Gadea, A., Farnea, E., Gelletly, W., Aprahamian, A., Bazzacco, D., Becker, F., Bizzeti, P.G., Bizzeti-Sona, A., Brandolini, F., de Acuña, D., De Poli, M., Eberth, J., Foltescu, D., Lenzi, S.M., Lunardi, S., Martinez, T., Napoli, D.R., Pavan, P., Petrache, C.M., Rossi Alvarez, C., Rudolph, D., Rubio, B., Satula, W., Skoda, S., Spolaore, P., Thomas, H.G., Ur, C.A., and Wyss, R.

Published
1997
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16. g Factor of the isomer in 126Sn and first observation of spin-alignment in relativistic fission

Author

Ilie, G., Neyens, G., Simpson, G.S., Jolie, J., Blazhev, A., Grawe, H., Lozeva, R.L., Vermeulen, N., Atanasova, L., Balabanski, D.L., Becker, F., Bednarczyk, P., Brandau, C., Caceres, L., Chamoli, S.K., Daugas, J.M., Doornenbal, P., Gerl, J., Górska, M., and Grȩbosz, J.

Subjects
*NUCLEAR moments, *TIN isotopes, *NUCLEAR fission, *RELATIVISTIC mechanics, *NEUTRONS, *POLARIZATION (Nuclear physics)
Abstract

Abstract: We report on the g factor measurement of the isomeric state (, ) in the neutron-rich 126Sn nucleus. The nucleus was produced by the fission of a relativistic 238U beam and reaction products were selected by the FRS fragment separator at GSI. For the first time, spin-alignment was observed after relativistic fission. It was used to deduce the g factor of the isomeric state, , from the measured perturbed angular distribution of its γ decay using the RISING Cluster detectors. The observed value confirms the suggested dominant configuration, which has been proposed for the isomers in neutron-rich Sn isotopes. The failure of the g factor additivity rule and the importance of core polarization evolution with increasing distance from the doubly-magic 132Sn is discussed. The first observation of 18(8)% of spin-alignment produced by the relativistic fission of a 238U beam paves the way to study moments of neutron-rich (sub-)microsecond isomers, which are difficult to align by other means. [Copyright &y& Elsevier]

Published
2010
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17. Yrast and non-yrast 2+ states of 134Ce and 136Nd populated in relativistic Coulomb excitation

Author

Saito, T.R., Saito, N., Starosta, K., Beller, J., Pietralla, N., Wollersheim, H.J., Balabanski, D.L., Banu, A., Bark, R.A., Beck, T., Becker, F., Bednarczyk, P., Behr, K.-H., Benzoni, G., Bizzeti, P.G., Boiano, C., Bracco, A., Brambilla, S., Brünle, A., and Bürger, A.

Subjects
*MODELS & modelmaking, *GEOMETRIC modeling, *GEOMETRY, *PHYSICS
Abstract

Abstract: The first 2+ states in 134Ce and 136Nd and the second 2+ state in 136Nd were populated by Coulomb excitation at relativistic energies, and γ-rays were measured using the RISING setup at GSI. For 134Ce an indication of the excitation to the second 2+ state was observed. This experiment performed for the first time Coulomb excitation to second 2+ states with rare isotope beams at relativistic energies. For 136Nd the , , and values relative to the previously known value for 134Ce are determined as 81(10), 11(3) and 180(92) W.u., respectively. The results are discussed in the framework of geometrical models that indicate pronounced γ-softness in these nuclei. [Copyright &y& Elsevier]

Published
2008
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18. Neutron–proton pairing competition in nuclei: Metastable state decays in the proton dripline nuclei 82 41Nb and 86 43Tc

Author

Garnsworthy, A.B., Regan, P.H., Cáceres, L., Pietri, S., Sun, Y., Rudolph, D., Górska, M., Podolyák, Zs., Steer, S.J., Hoischen, R., Heinz, A., Becker, F., Bednarczyk, P., Doornenbal, P., Geissel, H., Gerl, J., Grawe, H., Grȩbosz, J., Kelic, A., and Kojouharov, I.

Subjects
*PARTICLES (Nuclear physics), *NUCLEAR physics, *ANNIHILATION reactions, *ANYONS
Abstract

Abstract: The low-lying structures of the self-conjugate () nuclei 82 41Nb41 and 86 43Tc43 have been investigated using isomeric-decay spectroscopy following the projectile fragmentation of a 107Ag beam. These represent the heaviest odd–odd nuclei in which internal decays have been identified to date. The resulting level schemes shed light on the shape evolution along the line between the doubly-magic systems 56 28Ni and 100 50Sn and support a preference for states in odd–odd nuclei at low excitation energies associated with a neutron–proton pairing gap. Comparison with Projected Shell Model calculations suggests that the decay in 82Nb may be interpreted as an isospin-changing K isomer. [Copyright &y& Elsevier]

Published
2008
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19. The mirrors 36Ca and 36S: A test for isospin symmetry of shell gaps at the driplines

Author

Doornenbal, P., Reiter, P., Grawe, H., Otsuka, T., Al-Khatib, A., Banu, A., Beck, T., Becker, F., Bednarczyk, P., Benzoni, G., Bracco, A., Bürger, A., Caceres, L., Camera, F., Chmel, S., Crespi, F.C.L., Geissel, H., Gerl, J., Górska, M., and Grȩbosz, J.

Subjects
*ISOBARIC spin, *NUCLEAR physics, *COULOMB functions, *QUANTUM theory
Abstract

Abstract: The first excited state of 36Ca has been identified by its γ-decay, exploiting the two-step fragmentation technique at the FRS-RISING setup at GSI. This is the heaviest nucleus in the Segré chart in which a γ-decay of an excited state has been observed. A stable beam of 40Ca at impinged on a primary 9Be target. Out of the secondary beam of fragmentation products, 37Ca was separated by the FRS and struck on a second 9Be target at the final focus of the FRS. The energy for the decay of 36Ca was determined to be 3015(16) keV, which is 276 keV lower than in its mirror 36S. This mirror energy difference (MED) is discussed in the framework of shell model calculations using a 16O core, the sd shell isospin symmetric interaction USD and experimental single-particle energies from 17O and 17F. The results show that the MED within the sd shell provide a sensitive test for the evolution of the N, subshell gaps towards the driplines. Especially the N, gap is determined by Thomas–Ehrman shift in the , isospin doublet, while Coulomb effects are found to have marginal influence. [Copyright &y& Elsevier]

Published
2007
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20. Relativistic Coulomb excitation of neutron-rich 54,56,58Cr: On the pathway of magicity from to

Author

Bürger, A., Saito, T.R., Grawe, H., Hübel, H., Reiter, P., Gerl, J., Górska, M., Wollersheim, H.J., Al-Khatib, A., Banu, A., Beck, T., Becker, F., Bednarczyk, P., Benzoni, G., Bracco, A., Brambilla, S., Bringel, P., Camera, F., Clément, E., and Doornenbal, P.

Subjects
*PARTICLES (Nuclear physics), *STATISTICAL correlation, *NUCLEAR reactions, *NEUTRONS
Abstract

Abstract: The first excited states in 54,56,58Cr were populated by Coulomb excitation at relativistic energies and γ rays were measured using the RISING setup at GSI. For 56Cr and 58Cr the values relative to the previously known value for 54Cr are determined as 8.7(3.0) and 14.8(4.2) W.u., respectively. The results are consistent with a subshell closure at neutron number which was already indicated by the higher energy of the state in 56Cr. Recent large-scale shell model calculations using effective interactions reproduce the trend in the excitation energies, but fail to account for the minimum in the values at . [Copyright &y& Elsevier]

Published
2005
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