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417 results on '"Walker, Pm"'

1. 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

2. Competition between Allowed and First-Forbidden beta Decay : The Case of Hg-208 -> Tl-2(0)8

Author

Carroll, RJ, Podolyak, Zs, Berry, T, Grawe, H, Alexander, T, Andreyev, AN, Ansari, S, Borge, MJG, Brunet, M, Creswell, JR, Fraile, LM, Fahlander, C, Fynbo, HOU, Gamba, ER, Gelletly, W, Gerst, R-B, Gorska, M, Gredley, A, Greenlees, PT, Harkness-Brennan, LJ, Huyse, M, Judge, SM, Judson, DS, Konki, J, Kurcewicz, J, Kuti, I, Lalkovski, S, Lazarus, IH, Lica, R, Lund, M, Madurga, M, Marginean, N, Marginean, R, Marroquin, I, Mihai, C, Mihai, RE, Nacher, E, Negret, A, Nita, C, Pascu, S, Page, RD, Patel, Z, Perea, A, Phrompao, J, Piersa, M, Pucknell, V, Rahkila, P, Rapisarda, E, Regan, PH, Rotaru, F, Rudigier, M, Shand, CM, Shearman, R, Stegemann, S, Stora, T, Sotty, Ch, Tengblad, O, Van Duppen, P, Vedia, V, Wadsworth, R, Walker, PM, Warr, N, Wearing, F, De Witte, H, and Helsinki Institute of Physics

Subjects
Science & Technology, NUCLEAR-DATA SHEETS, Physics, Physical Sciences, Physics, Multidisciplinary, SELECTION RULE, Nuclear Theory, Nuclear Experiment, 114 Physical sciences
Abstract

The β decay of ^{208}Hg into the one-proton hole, one neutron-particle _{81}^{208}Tl_{127} nucleus was investigated at CERN-ISOLDE. Shell-model calculations describe well the level scheme deduced, validating the proton-neutron interactions used, with implications for the whole of the N>126, Z

Published
2020

3. Investigation of the Delta n=0 selection rule in Gamow-Teller transitions: The beta-decay of Hg-207

Author

Berry, TA, Podolyak, Zs, Carroll, RJ, Lica, R, Grawe, H, Timofeyuk, NK, Alexander, T, Andreyev, AN, Ansari, S, Borge, MJG, Creswell, J, Fahlander, C, Fraile, LM, Fynbo, HOU, Gelletly, W, Gerst, R-B, Gorska, M, Gredley, A, Greenlees, R, Harkness-Brennan, LJ, Huyse, M, Judge, SM, Judson, DS, Konki, J, Kurcewicz, J, Kuti, I, Lalkovski, S, Lazarus, I, Lund, M, Madurga, M, Marginean, N, Marginean, R, Marroquin, I, Mihai, C, Mihai, RE, Nacher, E, Nae, S, Negret, A, Nita, C, Page, RD, Pascu, S, Patel, Z, Perea, A, Pucknell, V, Rahkila, R, Rapisarda, E, Regan, PH, Rotaru, F, Shand, CM, Simpson, EC, Sotty, Ch, Stegemann, S, Stora, T, Tengblad, O, Turturicag, A, Van Duppen, R, Vedia, V, Wadsworth, R, Walker, PM, Warr, N, Wearing, F, and De Witte, H

Published
2019

4. Reinvestigation of the excited states in the proton emitter Lu-151: Particle-hole excitations across the N = Z = 64 subshell (vol 96, 064307, 2017)

Author

Wang, F, Sun, BH, Liu, Z, Qi, C, Zhu, LH, Scholey, C, Ashley, SF, Bianco, L, Cullen, IJ, Darby, IG, Eeckhaudt, S, Garnsworthy, AB, Gelletly, W, Gomez-Hornillos, MB, Grahn, T, Greenlees, PT, Jenkins, DG, Jones, GA, Jones, P, Joss, DT, Julin, R, Juutinen, S, Ketelhut, S, Khan, S, Kishada, A, Leino, M, Niikura, M, Nyman, M, Page, RD, Pakarinen, J, Pietri, S, Podolyak, Zs, Rahkila, P, Rigby, S, Saren, J, Shizuma, T, Sorri, J, Steer, S, Thomson, J, Thompson, NJ, Uusitalo, J, Walker, PM, and Williams, S

Published
2018

5. Spectroscopy of 25,65/67Mn: Strong coupling in the N = 40 'island of inversion'

Author

Liu, XY, Liu, Zhong, Ding, B, Doornenbal, P, Obertelli, A, Lenzi, SM, Walker, PM, Chung, LX, Linh, BD, Authelet, G, Baba, H, Calvet, D, Chateau, F, Corsi, A, Delbart, A, Gheller, JM, Gillibert, A, Isobe, T, Lapoux, V, Matsushita, M, Momiyama, S, Motobayashi, T, Niikura, M, Nowacki, F, Otsu, H, Péron, C, Peyaud, A, Pollacco, EC, Roussé, JY, Sakurai, H, Sasano, M, Shiga, Y, Takeuchi, S, Taniuchi, R, Uesaka, T, Wang, H, Yoneda, K, Lam, YH, Huang, TH, Sun, MD, Zhang, WQ, Lu, HY, Hou, DS, Browne, F, Dombradi, Zs, Franchoo, S, Giacoppo, Francesca, Gottardo, A, Hadynska-Klek, Katarzyna, 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, Eda, Santamaria, C, Shand, C, Söderstrom, PA, Stefan, GL, Steppenbeck, D, Sumikama, T, Suzuki, D, Vajta, Zs, Werner, V, Wu, J, Xu, Z, Zhou, XH, Zhang, YH, Xu, HS, and Zhang, FS

Abstract

Excited states in 63,65,67Mn were studied via in-beam γ -ray spectroscopy following knockout reactions from 68Fe. Similar level schemes, consisting of the 11/2−, 9/2−, 7/2− and 5/2− g.s. level sequence, connected by I → I − 1 transitions, were established, the first time for 65,67Mn. Their level structures show features consistent with strongly-coupled rotational bands with K = 5/2. State-of-the-art shellmodel 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 53−67Mn 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

6. Magnetic properties of Hf-177 and Hf-180 in the strong-coupling deformed model

Author

Muto, S, Stone, NJ, Bingham, CR, Stone, JR, Walker, PM, Audi, G, Gaulard, C, Koester, U, Nikolov, J, Nishimura, K, Ohtsubo, T, Podolyak, Z, Risegari, L, Simpson, GS, Veskovic, M, and Walters, WB

Abstract

This paper reports NMR measurements of the magnetic dipole moments of two high-K isomers, the 37/2-, 51.4 m, 2740 keV state in Hf177 and the 8-, 5.5 h, 1142 keV state in Hf180 by the method of on-line nuclear orientation. Also included are results on the angular distributions of γ transitions in the decay of the Hf177 isotope. These yield high precision E2/M1 multipole mixing ratios for transitions in bands built on the 23/2+, 1.1 s, isomer at 1315 keV and on the 9/2+, 0.663 ns, isomer at 321 keV. The new results are discussed in the light of the recently reported finding of systematic dependence of the behavior of the gR parameter upon the quasiproton and quasineutron make up of high-K isomeric states in this region. © 2014 American Physical Society.

Published
2016

7. 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, and Siwal, D

Subjects
FÍSICA NUCLEAR (INSTRUMENTAÇÃO), Nuclear physics, Physics, Nuclear and High Energy Physics, Computer simulation, chemistry, Isotope, Subatomic Physics, chemistry.chemical_element, Neutron, Uranium, Beta decay
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

8. Status of the Experimental Program on Mass Measurements of Stored Exotic Nuclei at the FRS-ESR Facility

Author

Litvinov, Ya, Geissel, H, Beckert, K, Beller, P, Bosch, F, Boutin, D, Brandau, C, Chen, L, Cullen, I, Dimopoulou, C, Fabian, B, Hausmann, M, Klepper, O, Knobel, R, Kozhuharov, C, Kurcewicz, J, Litvinov, Sa, Liu, Z, Mazzocco, Marco, Montes, F, Munzenberg, G, Musumarra, A, Nakajima, S, Nociforo, C, Nolden, F, Ohtsubo, T, Ozawa, A, Patyk, Z, Plass, W, Scheidenberger, C, Steck, M, Sun, B, Suzuki, T, Walker, Pm, Weick, H, Winckler, N, Winckler, M, and Yamaguchi, T.

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Isochronous mass spectrometry, Schottky diode, Nuclide, Experimental methods, Mass spectrometry, Ion
Abstract

Schottky Mass Spectrometry (SMS) and Isochronous Mass Spectrometry (IMS) have been successfully applied for direct mass measurements of exotic nuclides at FRS-ESR facility at GSI. Both experimental methods are sensitive to single stored ions and can cover very efficiently a large number of nuclides in one run. Presently, more than 1100 masses of different nuclides have been covered by SMS and IMS in several FRS-ESR experiments whereby about 350 of them have been determined for the first time. In this paper, we present the status of our experimental program and use the experimental mass values to test the predictive power of modern mass models.

Published
2007

9. Core excitations across the neutron shell gap in Tl-207

Author

Wilson, E, Podolyak, Z, Grawe, H, Brown, BA, Chiara, CJ, Zhu, S, Fornal, B, Janssens, RVF, Shand, CM, Bowry, M, Bunce, M, Carpenter, MP, Cieplicka-Orynczak, N, Deo, AY, Dracoulis, GD, Hoffman, CR, Kempley, RS, Kondev, FG, Lane, GJ, Lauritsen, T, Lotay, G, Reed, MW, Regan, PH, Triguero, CR, Seweryniak, D, Szpak, B, and Walker, PM

Subjects
Nuclear Theory
Abstract

The single closed-neutron-shell, one proton-hole nucleus 207Tl was populated in deep-inelastic collisions of a 208Pb beam with a 208Pb target. The yrast and near-yrast level scheme has been established up to high excitation energy, comprising an octupole phonon state and a large number of core excited states. Based on shell-model calculations, all observed single core excitations were established to arise from the breaking of the N=126 neutron core. While the shell-model calculations correctly predict the ordering of these states, their energies are compressed at high spins. It is concluded that this compression is an intrinsic feature of shell-model calculations using two-body matrix elements developed for the description of two-body states, and that multiple core excitations need to be considered in order to accurately calculate the energy spacings of the predominantly three-quasiparticle states.

Published
2015

10. ISOMERIC RATIOS IN Hg-206

Author

Alexander, T, Podolyak, Z, Cortes, ML, Gerl, J, Rudolph, D, Sarmiento, LG, Ameil, F, Arici, T, Bazzacco, D, Bauer, C, Bentley, MA, Blazhev, A, Bowry, M, Boutachkov, P, Carroll, R, Fahlander, C, Gadea, A, Gellanki, J, Gelletly, W, Givechev, A, Goel, N, Golubev, P, Gorska, M, Gottardo, A, Gregor, E, Guastalla, G, Habermann, T, Hackstein, M, Jungclaus, A, Kojouharov, I, Korten, W, Kumar, S, Kurz, N, Lalovic, N, Lettmann, M, Lizarazo, C, Louchart, C, Mandal, S, Merchan, E, Michelagnoli, C, Moeller, T, Moschner, K, Patel, Z, Pietralla, N, Pietri, S, Ralet, D, Reese, M, Regan, PH, Reiter, P, Schaffner, H, Singh, P, Stahl, C, Stegmann, R, Stezowksi, O, Taprogge, J, Thoele, P, Walker, PM, Wieland, O, Wendt, A, Wilson, E, Wood, R, and Wollersheim, H-J

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Nuclear Experiment
Abstract

206Hg was populated in the fragmentation of an E∕A = 1 GeV 208Pb beam at GSI. It was part of a campaign to study nuclei around 208Pb via relativistic Coulomb excitation. The observation of the known isomeric states confirmed the identification of the fragmentation products. The isomeric decays were also used to prove that the correlations between beam identification detectors and the AGATA γ-ray tracking array worked properly and that the tracking efficiency was independent of the time relative to the prompt flash.

Published
2015

11. STRUCTURE OF Pb-207 POPULATED IN Pb-208+Pb-208 DEEP-INELASTIC COLLISIONS

Author

Shand, CM, Wilson, E, Podolyak, Z, Grawe, H, Brown, BA, Fornal, B, Janssens, RVF, Bowry, M, Bunce, M, Carpenter, MP, Carroll, RJ, Chiara, CJ, Cieplicka-Orynczak, N, Deo, AY, Dracoulis, GD, Hoffman, CR, Kempley, RS, Kondev, FG, Lane, GJ, Lauritsen, T, Lotay, G, Reed, MW, Regan, PH, Rodriguez-Triguero, C, Seweryniak, D, Szpak, B, Walker, PM, and Zhu, S

Subjects
TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY
Abstract

The yrast structure of 207Pb above the 13=2+ isomeric state has been investigated in deep-inelastic collisions of 208Pb and 208Pb at ATLAS, Argonne National Laboratory. New and previously observed transitions were measured using the Gammasphere detector array. The level scheme of 207Pb is presented up to ∼ 6 MeV, built using coincidence and γ-ray intensity analyses. Spin and parity assignments of states were made, based on angular distributions and comparisons to shell model calculations.

Published
2015

12. Octupole transitions in the Pb-208 region

Author

Podolyak, Z, Shand, CM, Wilson, E, Brown, BA, Grawe, H, Chiara, CJ, Zhu, S, Fornal, B, Janssens, RVF, Bowry, M, Bunce, M, Carpenter, MP, Cieplicka, N, Deo, AY, Dracoulis, GD, Hoffman, CR, Kempley, RS, Kondev, FG, Lane, GJ, Lauritsen, T, Lotay, G, Reed, MW, Regan, PH, Triguero, CR, Seweryniak, D, Szpak, B, Walker, PM, Gargano, A, Coraggio, L, and Itaco, N

Published
2015

13. Isomer Decay Spectroscopy of Sm-164 and Gd-166: Midshell Collectivity Around N=100

Author

Patel, Z, Soederstroem, P-A, Podolyak, Z, Regan, PH, Walker, PM, Watanabe, H, Ideguchi, E, Simpson, GS, Liu, HL, Nishimura, S, Wu, Q, Xu, FR, Browne, F, Doornenbal, P, Lorusso, G, Rice, S, Sinclair, L, Sumikama, T, Wu, J, Xu, ZY, Aoi, N, Baba, H, Garrote, FLB, Benzoni, G, Daido, R, Fang, Y, Fukuda, N, Gey, G, Go, S, Gottardo, A, Inabe, N, Isobe, T, Kameda, D, Kobayashi, K, Kobayashi, M, Komatsubara, T, Kojouharov, I, Kubo, T, Kurz, N, Kuti, I, Li, Z, Matsushita, M, Michimasa, S, Moon, C-B, Nishibata, H, Nishizuka, I, Odahara, A, Sahin, E, Sakurai, H, Schaffner, H, Suzuki, H, Takeda, H, Tanaka, M, Taprogge, J, Vajta, Z, Yagi, A, and Yokoyama, R

Published
2014

14. Half-Life Systematics across the N=126 Shell Closure:Role of First-Forbidden Transitions in the beta Decay of Heavy Neutron-Rich Nuclei

Author

Morales, AI, Benlliure, J, Kurtukian-Nieto, T, Schmidt, K-H, Verma, S, Regan, PH, Podolyak, Z, Gorska, M, Pietri, S, Kumar, R, Casarejos, E, Al-Dahan, N, Algora, A, Alkhomashi, N, Alvarez-Pol, H, Benzoni, G, Blazhev, A, Boutachkov, P, Bruce, AM, Caceres, LS, Cullen, IJ, Bacelar, AMD, Doornenbal, P, Estevez-Aguado, ME, Farrelly, G, Fujita, Y, Garnsworthy, AB, Gelletly, W, Gerl, J, Grebosz, J, Hoischen, R, Kojouharov, I, Kurz, N, Lalkovski, S, Liu, Z, Mihai, C, Molina, F, Muecher, D, Rubio, B, Shaffner, H, Steer, SJ, Tamii, A, Tashenov, S, Valiente-Dobon, JJ, Walker, PM, Wollersheim, HJ, and Woods, PJ

Subjects
LIVES, SPECTROSCOPY, AU-205, 1ST MEASUREMENT, Nuclear Theory, ELEMENTS, ISOTOPES, ASTROPHYSICAL R-PROCESS, Nuclear Experiment
Abstract

This Letter reports on a systematic study of beta-decay half-lives of neutron-rich nuclei around doubly magic Pb-208. The lifetimes of the 126-neutron shell isotone Pt-204 and the neighboring Ir200-202, Pt-203, Au-204 are presented together with other 19 half-lives measured during the "stopped beam" campaign of the rare isotope investigations at GSI collaboration. The results constrain the main nuclear theories used in calculations of r-process nucleosynthesis. Predictions based on a statistical macroscopic description of the first-forbidden beta strength reveal significant deviations for most of the nuclei with N

Published
2014

15. Magnetic properties of Hf 177 and Hf 180 in the strong-coupling deformed model

Author

Muto, S, Stone, NJ, Bingham, CR, Stone, JR, Walker, PM, Podolyak, Z, Audi, G, Gaulard, C, Risegari, L, Köster, U, Nikolov, J, Veskovic, M, Nishimura, K, Ohtsubo, T, Simpson, GS, and Walters, WB

Abstract

This paper reports NMR measurements of the magnetic dipole moments of two high-K isomers, the 37/2-, 51.4 m, 2740 keV state in Hf177 and the 8-, 5.5 h, 1142 keV state in Hf180 by the method of on-line nuclear orientation. Also included are results on the angular distributions of γ transitions in the decay of the Hf177 isotope. These yield high precision E2/M1 multipole mixing ratios for transitions in bands built on the 23/2+, 1.1 s, isomer at 1315 keV and on the 9/2+, 0.663 ns, isomer at 321 keV. The new results are discussed in the light of the recently reported finding of systematic dependence of the behavior of the gR parameter upon the quasiproton and quasineutron make up of high-K isomeric states in this region. © 2014 American Physical Society.

Published
2014

16. Two-dimensional metal-chalcogenide films in tunable optical microcavities

Author

Schwarz, S, Dufferwiel, S, Walker, PM, Withers, F, Trichet, AA, Sich, M, Li, F, Chekhovich, EA, Borisenko, DN, Kolesnikov, NN, Novoselov, KS, Skolnick, MS, Smith, JM, Krizhanovskii, DN, and Tartakovskii, AI

Subjects
Condensed Matter::Quantum Gases, Condensed Matter - Materials Science, Condensed Matter::Materials Science, Physics::Optics, Materials Science (cond-mat.mtrl-sci), FOS: Physical sciences, Physics - Optics, Optics (physics.optics)
Abstract

Quasi-two-dimensional (2D) films of layered metal-chalcogenides have attractive optoelectronic properties. However, photonic applications of thin films may be limited owing to weak light absorption and surface effects leading to reduced quantum yield. Integration of 2D films in optical microcavities will permit these limitations to be overcome owing to modified light coupling with the films. Here we present tunable microcavities with embedded monolayer MoS2 or few monolayer GaSe films. We observe significant modification of spectral and temporal properties of photoluminescence (PL): PL is emitted in spectrally narrow and wavelength-tunable cavity modes with quality factors up to 7400; PL life-time shortening by a factor of 10 is achieved, a consequence of Purcell enhancement of the spontaneous emission rate. This work has potential to pave the way to microcavity-enhanced light-emitting devices based on layered 2D materials and their heterostructures, and also opens possibilities for cavity QED in a new material system of van der Waals crystals.

Published
2014
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17. Study of (TI126)-T-207 Produced in Deep-Inelastic Reactions

Author

Wilson, E, Podolyak, Z, Fornal, B, Janssens, RVF, Bowry, M, Bunce, M, Carpenter, MP, Chiara, CJ, Cieplicka, N, Deo, AY, Dracoulis, GD, Grawe, H, Hoffman, CR, Kempley, RS, Kondev, FG, Lane, GJ, Lauritsen, T, Reed, MW, Regan, PH, Triguero, CR, Szpak, B, Walker, PM, Zhu, S, Lunardi, S, Bizzeti, PG, Kabana, S, Bucci, C, Chiari, M, Dainese, A, DiNezza, P, Menegazzo, R, Nannini, A, Signorini, C, and ValienteDobon, JJ

Published
2014

18. New Isomers in the Neutron-Rich Region Beyond Pb-208

Author

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

Published
2014

19. Study of the level structure of Ag

Author

Sethi, J, Palit, R, Saha, S, Trivedi, T, Donthi, R, Jadhav, S, Jain, HC, Naidu, BS, Bhat, GH, Sheikh, JA, Datta, P, Carroll, JJ, Litz, MS, Mehta, D, Chattopadhyay, S, Garg, U, Karamian, S, Kumar, S, Sihotra, S, Naik, Z, and Walker, PM

Subjects
Nuclear Theory
Abstract

The high spin structure of Ag nucleus has been studied using the reaction B + Mo at 39 MeV with Indian National Gamma Array (INGA) at TIFR-BARC accelerator facility. From the two- and higher-fold coincidence analysis of the emitted γ-rays, the level structure of the nucleus is built, with addition of around ∼ 60 new transitions. A new positive parity dipole band has been observed and significant additions have been made in the low spin region. A pair of nearly degenerate, negative parity, dipole bands is established, which is studied using the triaxial projected shell model (TPSM). © Owned by the authors, published by EDP Sciences, 2014.

Published
2014

21. Increased isomeric lifetime of hydrogen-like Os-192m

Author

Akber, A, Reed, MW, Walker, PM, Litvinov, YA, Lane, GJ, Kibedi, T, Blaum, K, Bosch, F, Brandau, C, Carroll, JJ, Cullen, DM, Cullen, IJ, Deo, AY, Detwiler, B, Dimopoulou, C, Dracoulis, GD, Farinon, F, Geissel, H, Haettner, E, Heil, M, Kempley, RS, Knoebel, R, Kozhuharov, C, Kurcewicz, J, Kuzminchuk, N, Litvinov, S, Liu, Z, Mao, R, Nociforo, C, Nolden, F, Plass, WR, Podolyak, Z, Prochazka, A, Scheidenberger, C, Shubina, D, Steck, M, Stoehlker, T, Sun, B, Swan, TPD, Trees, G, Weick, H, Winckler, N, Winkler, M, Woods, PJ, Yamaguchi, T, Akber, A, Reed, MW, Walker, PM, Litvinov, YA, Lane, GJ, Kibedi, T, Blaum, K, Bosch, F, Brandau, C, Carroll, JJ, Cullen, DM, Cullen, IJ, Deo, AY, Detwiler, B, Dimopoulou, C, Dracoulis, GD, Farinon, F, Geissel, H, Haettner, E, Heil, M, Kempley, RS, Knoebel, R, Kozhuharov, C, Kurcewicz, J, Kuzminchuk, N, Litvinov, S, Liu, Z, Mao, R, Nociforo, C, Nolden, F, Plass, WR, Podolyak, Z, Prochazka, A, Scheidenberger, C, Shubina, D, Steck, M, Stoehlker, T, Sun, B, Swan, TPD, Trees, G, Weick, H, Winckler, N, Winkler, M, Woods, PJ, and Yamaguchi, T

Published
2015

22. New μs isomers in the neutron-rich Hg nucleus

Author

Gottardo, A, Valiente-Dobón, JJ, de Angelis, G, Modamio, V, Napoli, DR, Sahin, E, Lunardi, S, Algora, A, John, PR, Lenzi, SM, Benzoni, G, Bracco, A, Camera, F, Crespi, FCL, Corsi, A, Leoni, S, Million, B, Morales, AI, Nicolini, R, Wieland, O, Gadea, 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, Bunce, M, Denis Bacelar, AM, Grebosz, J, Podolyák, Z, Regan, PH, Al-Dahan, N, Bowry, M, Deo, AY, Farrelly, GF, Reed, MW, Swan, TPD, Walker, PM, Pfützner, M, Ayyad, Y, Benlliure, J, Alcántara Núñez, 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 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: the 8 isomer expected from the seniority scheme in the νg 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. © 2013 Elsevier B.V..

Published
2013

23. Schottky mass measurements of heavy neutron-rich nuclides in the element range 70 <= Z <= 79 at the GSI Experimental Storage Ring

Author

Shubina, D, Cakirli, RB, Litvinov, YA, Blaum, K, Brandau, C, Bosch, F, Carroll, JJ, Casten, RF, Cullen, DM, Cullen, IJ, Deo, AY, Detwiler, B, Dimopoulou, C, Farinon, F, Geissel, H, Haettner, E, Heil, M, Kempley, RS, Kozhuharov, C, Knoebel, R, Kurcewicz, J, Kuzminchuk, N, Litvinov, SA, Liu, Z, Mao, R, Nociforo, C, Nolden, F, Patyk, Z, Plass, WR, Prochazka, A, Reed, MW, Sanjari, MS, Scheidenberger, C, Steck, M, Stoehlker, T, Sun, B, Swan, TPD, Trees, G, Walker, PM, Weick, H, Winckler, N, Winkler, M, Woods, PJ, Yamaguchi, T, and Zhou, C

Published
2013

24. Submicrosecond isomer in Rh-117(45)72 and the role of triaxiality in its electromagnetic decay rate

Author

Lalkovski, S, Bruce, AM, Bacelar, AMD, Gorska, M, Pietri, S, Podolyak, Z, Bednarczyk, P, Caceres, L, Casarejos, E, Cullen, IJ, Doornenbal, P, Farrelly, GF, Garnsworthy, AB, Geissel, H, Gelletly, W, Gerl, J, Grebosz, J, Hinke, C, Ilie, G, Ivanova, D, Jaworski, G, Kisyov, S, Kojouharov, I, Kurz, N, Minkov, N, Myalski, S, Palacz, M, Petkov, P, Prokopowicz, W, Regan, PH, Schaffner, H, Steer, S, Tashenov, S, Walker, PM, and Wollersheim, HJ

Published
2013

25. beta-delayed gamma-ray spectroscopy of Au-203,Au-204 and Pt200-202

Author

Morales, AI, Benlliure, J, Gorska, M, Grawe, H, Verma, S, Regan, PH, Podolyak, Z, Pietri, S, Kumar, R, Casarejos, E, Algora, A, Alkhomashi, N, Alvarez-Pol, H, Benzoni, G, Blazhev, A, Boutachkov, P, Bruce, AM, Caceres, LS, Cullen, IJ, Bacelar, AMD, Doornenbal, P, Estevez-Aguado, ME, Farrelly, G, Fujita, Y, Garnsworthy, AB, Gelletly, W, Gerl, J, Grebosz, J, Hoischen, R, Kojouharov, I, Kurz, N, Lalkovski, S, Liu, Z, Mihai, C, Molina, F, Muecher, D, Prokopowicz, W, Rubio, B, Schaffner, H, Steer, SJ, Tamii, A, Tashenov, S, Valiente-Dobon, JJ, Walker, PM, Wollersheim, HJ, and Woods, PJ

Published
2013

26. CORE EXCITATIONS ACROSS THE NEUTRON SHELL GAP IN Tl-207

Author

Wilson, E, Podolyak, Z, Fornal, B, Janssens, RVF, Bowry, M, Bunce, M, Carpenter, MP, Chiara, CJ, Cieplicka, N, Deo, AY, Dracoulis, GD, Grawe, H, Hoffman, CR, Kempley, RS, Kondev, FG, Lane, GJ, Lauritsen, T, Reed, MW, Regan, PH, Triguero, CR, Szpak, B, Walker, PM, and Zhu, S

Subjects
Nuclear Experiment
Abstract

Deep-inelastic collisions of a 208Pb beam on a 208Pb target were performed using the ATLAS accelerator at Argonne National Laboratory. Prompt and delayed γ-rays from the reaction products were detected using the GAMMASPHERE detector array. The cross-coincidence method was used to identify transitions in 207Tl, by gating on γ-rays from its better-characterised reaction partner 209Bi. A number of new transitions were found in 207Tl.

Published
2013

27. Structure of nearly degenerate dipole bands in Ag

Author

Sethi, J, Palit, R, Saha, S, Trivedi, T, Donthi, R, Jadhav, S, Jain, HC, Naidu, BS, Bhat, GH, Sheikh, JA, Datta, P, Carroll, JJ, Litz, MS, Chattopadhyay, S, Garg, U, Karamian, S, Kumar, S, Mehta, D, Sihotra, S, Naik, Z, and Walker, PM

Subjects
Nuclear Experiment
Abstract

The high spin negative parity states of Ag have been investigated with the B+Mo reaction at 39 MeV beam energy using the INGA facility at TIFR, Mumbai. From the γ-γ coincidence analysis, an excited negative parity band has been established and found to be nearly degenerate with the ground state band. The spin and parity of the levels are assigned using angular correlation and polarization measurements. This pair of degenerate bands in Ag is studied using the recently developed microscopic triaxial projected shell model approach. The observed energy levels and the ratio of the electromagnetic transition probabilities of these bands in this isotope are well reproduced by the present model. Further, it is shown that the partner band has a different quasiparticle structure as compared to the yrast band. © 2013 Elsevier B.V.

Published
2013

28. Evidence for a K approximate to.139/2 beta-decaying isomer in Lu-177

Author

Al Garni S, Walker PM, Regan PH, Narro JG, El Masri HM, Roeckl E, Kirchner R, Mazzocchi C, Grawe H, Borcea R, Doring J, Wooding SC, Schmidt K, Wheldon C, Cullen DM, Schmidt Ott WD, LA COMMARA, MARCO, Al Garni, S, Walker, Pm, Regan, Ph, Narro, Jg, El Masri, Hm, Roeckl, E, Kirchner, R, LA COMMARA, Marco, Mazzocchi, C, Grawe, H, Borcea, R, Doring, J, Wooding, Sc, Schmidt, K, Wheldon, C, Cullen, Dm, and Schmidt Ott, Wd

Published
2002

29. New isomers in the full seniority scheme of neutron-rich lead isotopes: The role of effective three-body forces

Author

Gottardo, A, Valiente-Dobón, JJ, De Angelis, G, Napoli, DR, Sahin, E, Lunardi, S, Lenzi, SM, Maglione, E, Benzoni, G, Nicolini, R, Bracco, A, Camera, F, Crespi, FCL, Corsi, A, Leoni, S, Million, B, Morales, AI, Wieland, O, 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, Bunce, M, Denis Bacelar, AM, Grebosz, J, Podolyák, Z, Regan, PH, Al-Dahan, N, Bowry, 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, Nowacki, F, and Zuker, AP

Subjects
Body force, Physics, Valence (chemistry), Isotope, SHELL model, General Physics and Astronomy, chemistry.chemical_element, Uranium, Three-body force, Nuclear physics, chemistry, Nuclear Physics - Theory, Subatomic Physics, Nuclear Physics - Experiment, Neutron, Atomic physics, Nuclear Experiment
Abstract

The neutron-rich lead isotopes, up to Pb216, have been studied for the first time, exploiting the fragmentation of a primary uranium beam at the FRS-RISING setup at GSI. The observed isomeric states exhibit electromagnetic transition strengths which deviate from state-of-the-art shell-model calculations. It is shown that their complete description demands the introduction of effective three-body interactions and two-body transition operators in the conventional neutron valence space beyond Pb208. © 2012 American Physical Society.

Published
2012

31. Properties of neutron-rich hafnium high-spin isomers

Author

Walker, PM, Regan, PH, Podolyak, Z, Reed, MW, Wood, RT, Kowalska, M, Flanagan, KT, Billowes, J, Cheal, B, Forest, DH, Tungate, G, Neyens, G, Bissell, ML, Köster, U, Litvinov, Y, Kozhuharov, C, Blank, B, Delahaye, P, and Dracoulis, GD

Subjects
Detectors and Experimental Techniques
Published
2012

32. β decay of Y produced in projectile fission of U

Author

Bruce, AM, Bacelar, AMD, Benzoni, G, Gottardo, A, Nicolini, R, Sahin, E, Gadea, A, Algora, A, Górska, M, Pietri, S, Boutachkov, P, Cortés, ML, Domingo-Prado, C, Farinon, F, Geissel, H, Gerl, J, Goel, N, Gregor, E, Haberman, T, Hoischen, R, Kojouharov, I, Kurz, N, Nociforo, C, Prochazka, A, Prokopowicz, W, Schaffner, H, Sharma, A, Weick, H, Wollersheim, H-J, Valiente-Dobón, JJ, Mengoni, D, Podolyák, Z, Al-Dahan, N, Alkhomashi, N, Bowry, M, Bunce, M, Deo, AY, Farrelly, GF, Regan, PH, Walker, PM, Alcántara-Núñez, JA, Ayyad, Y, Allegro, PRP, Casarejos, E, Doncel, M, Eppinger, K, Klupp, S, Steiger, K, Grȩbosz, J, Rudolph, D, Janik, R, Sitar, B, Strmen, P, Szarka, I, Lunardi, S, Menegazzo, R, Mandal, S, Siwal, D, Naqvi, F, and Pissulla, T

Abstract

The population of Zr following the β decay of Y produced in the projectile fission of U at the GSI facility in Darmstadt, Germany has been studied. Y is known to decay into Zr via two states, one of high spin and the other low spin. These states preferentially populate different levels in the Zr daughter. In this paper the intensities of transitions in Zr observed are compared with those from the decay of the low-spin level studied at the TRISTAN facility at Brookhaven National Laboratory and of the high-spin level studied at the JOSEF separator at the Kernforschungsanlage Jülich. © Published under licence by IOP Publishing Ltd.

Published
2012

33. Technique for resolving low-lying isomers in the experimental storage ring (ESR) and the occurrence of an isomeric state in Re

Author

Reed, MW, Walker, PM, Cullen, IJ, Deo, AY, Kempley, RS, Swan, TPD, Litvinov, YA, Bosch, F, Brandau, C, Shubina, D, Winckler, N, Blaum, K, Dimopoulou, C, Farinon, F, Geissel, H, Heil, M, Knöbel, R, Kozhuharov, C, Kurcewicz, J, Kuzminchuk, N, Litvinov, S, Nociforo, C, Nolden, F, Prochazka, A, Scheidenberger, C, Steck, M, Stöhlker, T, Sun, B, Weick, H, Winkler, M, Carroll, JJ, Cullen, DM, Detwiler, B, Trees, G, Dracoulis, GD, Haettner, E, Pla, WR, Liu, Z, Woods, PJ, Mao, R, and Yamaguchi, T

Subjects
Nuclear Experiment
Abstract

A recent experiment using projectile fragmentation of a Au beam on a Be target, combined with the fragment recoil separator and experimental storage ring at ring at GSI, has uncovered an isomeric state in Re at 267(10) keV with a half-life of ∼60 s. The data analysis technique used to resolve the isomeric state from the ground state is discussed. © Published under licence by IOP Publishing Ltd.

Published
2012

34. Multiple β - Decaying states in 194Re: Shape evolution in neutron-rich osmium isotopes

Author

Al-Dahan, N, Regan, PH, Podolyák, Z, Walker, PM, Alkhomashi, N, Dracoulis, GD, Farrelly, G, Benlliure, J, Pietri, SB, Casten, RF, Stevenson, PD, Gelletly, W, Steer, SJ, Garnsworthy, AB, Casarejos, E, Gerl, J, Wollersheim, HJ, Grebosz, J, Górska, M, Kojouharov, I, Schaffner, H, Algora, A, Benzoni, G, Blazhev, A, Boutachkov, P, Bruce, AM, Cullen, IJ, Denis Bacelar, AM, Deo, AY, Estevez, ME, Fujita, Y, Hoischen, R, Kumar, R, Lalkovski, S, Liu, Z, Mason, PJ, Mihai, C, Molina, F, Mücher, D, Rubio, B, Tamii, A, Tashenov, S, Valiente-Dobón, JJ, and Woods, PJ

Subjects
Nuclear Experiment
Abstract

decays from heavy, neutron-rich nuclei with A∼190 have been investigated following their production via the relativistic projectile fragmentation of an E/A=1 GeV 208Pb primary beam on a ∼2.5 g/cm2 9Be target. The reaction products were separated and identified using the GSI FRagment Separator (FRS) and stopped in the RISING active stopper. γ decays were observed and correlated with these secondary ions on an event-by-event basis such that γ-ray transitions following from both internal (isomeric) and β decays were recorded. A number of discrete, β-delayed γ-ray transitions associated with β decays from 194Re to excited states in 194Os have been observed, including previously reported decays from the yrast Iπ=(6+) state. Three previously unreported γ-ray transitions with energies 194, 349, and 554 keV are also identified; these transitions are associated with decays from higher spin states in 194Os. The results of these investigations are compared with theoretical predictions from Nilsson multi-quasiparticle (MQP) calculations. Based on lifetime measurements and the observed feeding pattern to states in 194Os, it is concluded that there are three β−-decaying states in 194Re.

Published
2012

35. New results on mass measurements of stored neutron-rich nuclides in the element range from Pt to U with the FRS-ESR facility at 360-400MeV/u

Author

Chen, L, Plaß, WR, Geissel, H, Knöbel, R, Kozhuharov, C, Litvinov, Y, Patyk, Z, Scheidenberger, C, Siegień-Iwaniuk, K, Sun, B, Weick, H, Beckert, K, Beller, P, Bosch, F, Boutin, D, Caceres, L, Carroll, JJ, Cullen, DM, Cullen, IJ, Franzke, B, Gerl, J, Górska, M, Jones, GA, Kishada, A, Kurcewicz, J, Litvinov, SA, Liu, Z, Mandal, S, Montes, F, Münzenberg, G, Nolden, F, Ohtsubo, T, Podolyák, Z, Propri, R, Rigby, S, Saito, N, Saito, T, Shindo, M, Steck, M, Walker, PM, Williams, S, Winkler, M, Wollersheim, H-J, and Yamaguchi, T

Subjects
Nuclear Experiment
Abstract

Masses of 238U projectile fragments have been measured with time-resolved Schottky Mass Spectrometry (SMS) at the FRS-ESR facility at GSI. The exotic nuclei were created in the production target at the entrance of the fragment separator FRS, spatially separated in flight and injected into the storage-cooler ring ESR at about 70% light velocity. This means the ions were mainly bare or carried only a few electrons, e.g., the population of Li-like ions was below 1% for Pt fragments. Accurate newmass values of 33 neutron-rich, stored exotic nuclei in the element range from platinum to uranium have been obtained for the first time. In total more than 150 nuclides including references with well-known masses have been covered in this large-area SMS measurement. A novel data analysis has been applied which reduces the systematic errors by taking into account the velocity profile of the cooler electrons and the residual ion-optical dispersion in this part of the storage ring. The experiment, the data analysis, and the mass values are presented. The experimental data are compared with theoretical predictions demonstrating systematic deviations of up to 1500 keV from modern mass models.

Published
2012

36. Single-particle isomeric states in Pd and Ru

Author

Lalkovski, S, Kisyov, S, Zhekova, M, Bruce, AM, Bacelar, AMD, Górska, M, Pietri, S, Bednarczyk, P, Caceres, L, Doornenbal, P, Geissel, H, Gerl, J, Grȩbosz, J, Kojouharov, I, Kurz, N, Prokopowicz, W, Schaffner, H, Tashenov, S, Wollersheim, HJ, Podolyák, Z, Cullen, IJ, Farrelly, GF, Garnsworthy, AB, Gelletly, W, Regan, PH, Steer, S, Walker, PM, Casarejos, E, Myalski, S, Hinke, C, Ilie, G, Jaworski, G, and Palacz, M

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Physics::Atomic and Molecular Clusters, Nuclear Experiment
Abstract

Neutron-rich nuclei were populated in a relativistic fission of U. Gamma-rays with energies of 135 keV and 184 keV were associated with two isomeric states in Pd and Ru. Half-lives of 0.63(5) μs and 2.0(3) μs were deduced and the isomeric states were interpreted in terms of prolate deformed single-particle states.

Published
2012

37. Storage ring at HIE-ISOLDE: Technical design report: Technical design report

Author

Grieser, M, Litvinov, YA, Raabe, R, Blaum, K, Blumenfeld, Y, Butler, PA, Wenander, F, Woods, PJ, Aliotta, M, Andreyev, A, Artemyev, A, Atanasov, D, Aumann, T, Balabanski, D, Barzakh, A, Batist, L, Bernardes, A-P, Bernhardt, D, Billowes, J, Bishop, S, Borge, M, Borzov, I, Bosch, F, Boston, AJ, Brandau, C, Catford, W, Catherall, R, Cederkäll, J, Cullen, D, Davinson, T, Dillmann, I, Dimopoulou, C, Dracoulis, G, Düllmann, CE, Egelhof, P, Estrade, A, Fischer, D, Flanagan, K, Fraile, L, Fraser, MA, Freeman, SJ, Geissel, H, Gerl, J, Greenlees, P, Grisenti, RE, Habs, D, von Hahn, R, Hagmann, S, Hausmann, M, He, JJ, Heil, M, Huyse, M, Jenkins, D, Jokinen, A, Jonson, B, Joss, DT, Kadi, Y, Kalantar-Nayestanaki, N, Kay, BP, Kiselev, O, Kluge, H-J, Kowalska, M, Kozhuharov, C, Kreim, S, Kröll, T, Kurcewicz, J, Labiche, M, Lemmon, RC, Lestinsky, M, Lotay, G, Ma, XW, Marta, M, Meng, J, Mücher, D, Mukha, I, Müller, A, Murphy, AS, Neyens, G, Nilsson, T, Nociforo, C, Nörtershäuser, W, Page, RD, Pasini, M, Petridis, N, Pietralla, N, Pfützner, M, Podolyák, Z, Regan, P, Reed, MW, Reifarth, R, Reiter, P, Repnow, R, Riisager, K, Rubio, B, Sanjari, MS, Savin, DW, Scheidenberger, C, Schippers, S, Schneider, D, Schuch, R, Schwalm, D, Schweikhard, L, Shubina, D, Siesling, E, Simon, H, Simpson, J, Smith, J, Sonnabend, K, Steck, M, Stora, T, Stöhlker, T, Sun, B, Surzhykov, A, Suzaki, F, Tarasov, O, Trotsenko, S, Tu, XL, Van Duppen, P, Volpe, C, Voulot, D, Walker, PM, Wildner, E, Winckler, N, Winters, DFA, Wolf, A, Xu, HS, Yakushev, A, Yamaguchi, T, Yuan, YJ, Zhang, YH, and Zuber, K

Subjects
Physics::Accelerator Physics, Nuclear Experiment
Abstract

We propose to install a storage ring at an ISOL-type radioactive beam facility for the first time. Specifically, we intend to setup the heavy-ion, low-energy ring TSR at the HIE-ISOLDE facility in CERN, Geneva. Such a facility will provide a capability for experiments with stored secondary beams that is unique in the world. The envisaged physics programme is rich and varied, spanning from investigations of nuclear ground-state properties and reaction studies of astrophysical relevance, to investigations with highly-charged ions and pure isomeric beams. The TSR might also be employed for removal of isobaric contaminants from stored ion beams and for systematic studies within the neutrino beam programme. In addition to experiments performed using beams recirculating within the ring, cooled beams can also be extracted and exploited by external spectrometers for high-precision measurements. The existing TSR, which is presently in operation at the Max-Planck Institute for Nuclear Physics in Heidelberg, is well-suited and can be employed for this purpose. The physics cases as well as technical details of the existing ring facility and of the beam and infrastructure requirements at HIE-ISOLDE are discussed in the present technical design report.

Published
2012

38. Structural Evolution in the Neutron-Rich Nuclei Zr-106 and Zr-108

Author

Sumikama, T, Yoshinaga, K, Watanabe, H, Nishimura, S, Miyashita, Y, Yamaguchi, K, Sugimoto, K, Chiba, J, Li, Z, Baba, H, Berryman, JS, Blasi, N, Bracco, A, Camera, F, Doornenbal, P, Go, S, Hashimoto, T, Hayakawa, S, Hinke, C, Ideguchi, E, Isobe, T, Ito, Y, Jenkins, DG, Kawada, Y, Kobayashi, N, Kondo, Y, Kruecken, R, Kubono, S, Lorusso, G, Nakano, T, Kurata-Nishimura, M, Odahara, A, Ong, HJ, Ota, S, Podolyak, Z, Sakurai, H, Scheit, H, Steiger, K, Steppenbeck, D, Takano, S, Takashima, A, Tajiri, K, Teranishi, T, Wakabayashi, Y, Walker, PM, Wieland, O, and Yamaguchi, H

Published
2011

40. NEW STRUCTURES IN (HF)-H-178 AND COULOMB EXCITATION OF ISOMERS

Author

Hayes, AB, Cline, D, Wu, CY, Hurst, AM, Carpenter, MP, Greene, JP, Janssens, RVF, Lauritsen, T, Seweryniak, D, Zhu, S, Karamian, SA, Walker, PM, Swan, TPD, Rigby, SV, Cullen, DM, Lumley, NM, Mason, P, Carroll, JJ, Detwiler, B, Harle, T, Mills, I, and Trees, G

Published
2011

42. β-decay half-lives of very neutron-rich Kr to Tc isotopes on the boundary of the r-process path: an indication of fast r-matter flow

Author

Nishimura, S, Li, Z, Watanabe, H, Yoshinaga, K, Sumikama, T, Tachibana, T, Yamaguchi, K, Kurata-Nishimura, M, Lorusso, G, Miyashita, Y, Odahara, A, Baba, H, Berryman, JS, Blasi, N, Bracco, A, Camera, F, Chiba, J, Doornenbal, P, Go, S, Hashimoto, T, Hayakawa, S, Hinke, C, Ideguchi, E, Isobe, T, Ito, Y, Jenkins, DG, Kawada, Y, Kobayashi, N, Kondo, Y, Krücken, R, Kubono, S, Nakano, T, Ong, HJ, Ota, S, Podolyák, Z, Sakurai, H, Scheit, H, Steiger, K, Steppenbeck, D, Sugimoto, K, Takano, S, Takashima, A, Tajiri, K, Teranishi, T, Wakabayashi, Y, Walker, PM, Wieland, O, and Yamaguchi, H

Abstract

The β-decay half-lives of 38 neutron-rich isotopes from (36)Kr to (43)Tc have been measured; the half-lives of (100)Kr, (103-105)Sr, (106-108)Y, (108-110)Zr, (111,112)Nb, (112-115)Mo, and (116,117)Tc are reported here. The results when compared with previous standard models indicate an overestimation in the predicted half-lives by a factor of 2 or more in the A≈110 region. A revised model based on the second generation gross theory of β decay better predicts the measured half-lives and suggests a more rapid flow of the rapid neutron-capture process (r-matter flow) through this region than previously predicted.

Published
2010

43. Shape coexistence and isomeric states in neutron-rich Tc-112 and Tc-113

Author

Bruce, AM, Lalkovski, S, Bacelar, AMD, Gorska, M, Pietri, S, Podolyak, Z, Shi, Y, Walker, PM, Xu, FR, Bednarczyk, P, Caceres, L, Casarejos, E, Cullen, IJ, Doornenbal, P, Farrelly, GF, Garnsworthy, AB, Geissel, H, Gelletly, W, Gerl, J, Grebosz, J, Hinke, C, Ilie, G, Jaworski, G, Kojouharov, I, Kurz, N, Myalski, S, Palacz, M, Prokopowicz, W, Regan, PH, Schaffner, H, Steer, S, Tashenov, S, and Wollersheim, HJ

Published
2010

46. Isomeric decay spectroscopy of the Bi-217 isotope

Author

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

Published
2014

47. Half-Life Systematics across the N=126 Shell Closure: Role of First-Forbidden Transitions in the beta Decay of Heavy Neutron-Rich Nuclei

Author

Morales, AI, Benlliure, J, Kurtukian-Nieto, T, Schmidt, K-H, Verma, S, Regan, PH, Podolyak, Z, Gorska, M, Pietri, S, Kumar, R, Casarejos, E, Al-Dahan, N, Algora, A, Alkhomashi, N, Alvarez-Pol, H, Benzoni, G, Blazhev, A, Boutachkov, P, Bruce, AM, Caceres, LS, Cullen, IJ, Bacelar, AMD, Doornenbal, P, Estevez-Aguado, ME, Farrelly, G, Fujita, Y, Garnsworthy, AB, Gelletly, W, Gerl, J, Grebosz, J, Hoischen, R, Kojouharov, I, Kurz, N, Lalkovski, S, Liu, Z, Mihai, C, Molina, F, Muecher, D, Rubio, B, Shaffner, H, Steer, SJ, Tamii, A, Tashenov, S, Valiente-Dobon, JJ, Walker, PM, Wollersheim, HJ, Woods, PJ, Morales, AI, Benlliure, J, Kurtukian-Nieto, T, Schmidt, K-H, Verma, S, Regan, PH, Podolyak, Z, Gorska, M, Pietri, S, Kumar, R, Casarejos, E, Al-Dahan, N, Algora, A, Alkhomashi, N, Alvarez-Pol, H, Benzoni, G, Blazhev, A, Boutachkov, P, Bruce, AM, Caceres, LS, Cullen, IJ, Bacelar, AMD, Doornenbal, P, Estevez-Aguado, ME, Farrelly, G, Fujita, Y, Garnsworthy, AB, Gelletly, W, Gerl, J, Grebosz, J, Hoischen, R, Kojouharov, I, Kurz, N, Lalkovski, S, Liu, Z, Mihai, C, Molina, F, Muecher, D, Rubio, B, Shaffner, H, Steer, SJ, Tamii, A, Tashenov, S, Valiente-Dobon, JJ, Walker, PM, Wollersheim, HJ, and Woods, PJ

Published
2014

48. Isomeric states in neutron-deficient A ∼ 80–90 nuclei populated in the fragmentation of 107Ag

Author

Garnsworthy, A.B., Regan, P.H., Piétri, S., Sun, Y., Xu, F.R., Rudolph, D., Gorska, M., Caceres, L., Podolyak, Zs., Steer, S.J., Hoischen, R., Heinz, A., Becker, F., Bednarczyk, P., Doornenbal, P., Geissel, H., Gerl, J., Grawe, H., Grebosz, J., Kelic, A., Kojouharov, I., Kurz, N., Montes, F., Prokopwicz, W., Saito, T., Schaffner, H., Tachenov, S., Werner-Malento, E., Wollersheim, H.J., Benzoni, G., Blank, Bertram, Brandau, C., Bruce, A.M., Camera, F., Catford, W.N., Cullen, I.J., Dombradi, Z., 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., Pfutzner, M., Schwertel, S., Shizuma, T., Walker, Pm., Wieland, O., Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), and Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear Theory, 29.30.Kv, 23.20.Lv, 23.35.+g, 27.50.+e, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

The relativistic projectile fragmentation of a 750 MeV per nucleon beam of 107Agwas used to populate isomeric states in neutron-deficient nuclei around A = 80–90. Reaction products were separated and unambiguously identified using the GSI FRagment Separator (FRS) and its ancillary detectors. At the final focal plane, the fragments were slowed from relativistic energies by means of an aluminium degrader and implanted in a passive stopper in the center of the high-efficiency, high-granularity Stopped Rare Isotope Spectroscopic INvestigation at GSI (RISING) germanium array. This allowed the identification of excited states in the N = Z nuclei 86 43Tc and, for the first time, 82 41Nb. Isomeric states have also been identified for the first time in 87,88Tc, and a previously unreported isomer was observed in 84Nb. Experimental results are presented along with a discussion on the structure of these nuclei based on interpretations provided by several theoretical models.

Published
2009

49. Isomeric states in neutron-deficient A similar to 80-90 nuclei populated in the fragmentation of Ag-107

Author

Garnsworthy, AB, Regan, PH, Pietri, S, Sun, Y, Xu, FR, Rudolph, D, Gorska, M, Caceres, L, Podolyak, Z, Steer, SJ, Hoischen, R, Heinz, A, Becker, F, Bednarczyk, P, Doornenbal, P, Geissel, H, Gerl, J, Grawe, H, Grebosz, J, Kelic, A, Kojouharov, I, Kurz, N, Montes, F, Prokopwicz, W, Saito, T, Schaffner, H, Tachenov, S, Werner-Malento, E, Wollersheim, HJ, Benzoni, G, Blank, B, Brandau, C, Bruce, AM, Camera, F, Catford, WN, Cullen, IJ, Dombradi, Z, Estevez, E, Gelletly, W, Ilie, G, Jolie, J, Jones, GA, Jungclaus, A, Kmiecik, M, Kondev, FG, Kurtukian-Nieto, T, Lalkovski, S, Liu, Z, Maj, A, Myalski, S, Pfuetzner, M, Schwertel, S, Shizuma, T, Simons, AJ, Walker, PM, and Wieland, O

Published
2009

50. beta(-)-delayed spectroscopy of neutron-rich tantalum nuclei: Shape evolution in neutron-rich tungsten isotopes

Author

Alkhomashi, N, Regan, PH, Podolyak, Z, Pietri, S, Garnsworthy, AB, Steer, SJ, Benlliure, J, Caserejos, E, Casten, RF, Gerl, J, Wollersheim, HJ, Grebosz, J, Farrelly, G, Gorska, M, Kojouharov, I, Schaffner, H, Algora, A, Benzoni, G, Blazhev, A, Boutachkov, P, Bruce, AM, Bacelar, AMD, Cullen, IJ, Caceres, L, Doornenbal, P, Estevez, ME, Fujita, Y, Gelletly, W, Hoischen, R, Kumar, R, Kurz, N, Lalkovski, S, Liu, Z, Mihai, C, Molina, F, Morales, AI, Muecher, D, Prokopowicz, W, Rubio, B, Shi, Y, Tamii, A, Tashenov, S, Valiente-Dobon, JJ, Walker, PM, Woods, PJ, and Xu, FR

Published
2009

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