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2 results on '"Valiente Dobon, JJ"'

1. 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

2. New sub-mu s isomers in Sn-125,Sn-127,Sn-129 and isomer systematics of Sn124-130

Author

Lozeva Lozeva, Radomira, Grawe, H, Neyens, Gerda, Atanasova, LA, Balabanski, DL, Bazzacco, D, Becker, F, Bednarczyk, P, Benzoni, G, Blasi, N, Blazhev, A, Bracco, A, Brandau, C, Caceres, L, Camera, F, Chamoli, SK, Crespi, FCL, Daugas, J-M, Detistov, P, De Rydt, Marieke, Doornenbal, P, Fahlander, C, Farnea, E, Georgiev, G, Gerl, J, Gladnishki, KA, Gorska, M, Grebosz, J, Hass, M, Hoischen, R, Ilie, G, Ionescu-Bujor, M, Iordachescu, A, Jungclaus, A, Kmiecik, M, Kojouharov, I, Kurz, N, Lakshmi, SP, Lo Bianco, G, Mallion, Stephen, Maj, A, Montanari, D, Perru, O, Pfuetzner, M, Pietri, S, Pinston, JA, Podolyak, Zs, Prokopowicz, W, Rudolph, D, Rusev, G, Saitoh, TR, Saltarelli, A, Schaffner, H, Schwengner, R, Tashenov, S, Turzo, K, Valiente-Dobon, JJ, Vermeulen, Nele, Walker, J, Werner-Malento, E, Wieland, O, and Wollersheim, H-J

Subjects
transition-probabilities, isomer lifetimes, heavy-ion collisions, 125-129Sn isomers, relativistic U-fission, yrast isomers, g-RISING, gsi, nuclei, gamma-ray, energy-levels, beta-decay, isotopes, detectors
Abstract

New sub-mu s isomers have been observed in the neutron-rich Sn isotopes. Sn-125,Sn-127,Sn-129 nuclei have been produced in a relativistic fission reaction of U-238 on a Be-9 target at 750 A.MeV and by the fragmentation of Xe-136 at 600 A.MeV populating high-spin yrast states. In addition to the already known mu s isomers, three new ones with sub-mu s half-lives have been observed. These yrast isomers are the high-spin members of the nu(d(3/2)(-1)h(11/2)(-2)) and nu h(11/2)(-n), seniority v = 3 multiplets leading to isomeric (23/2(+)) and (27/2(-)) states, respectively. Added to the already known 19/2(+)mu s isomers in this region the current work completes the systematic information of neutron-hole excitations toward the filling of the last h(11/2) orbital at N = 82. The results are discussed in the framework of state-of-the-art shell-model calculations using realistic interactions. ispartof: Physical Review C, Nuclear Physics vol:77 issue:6 pages:1-15 status: published

Published
2008

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