Nuclear structure and stellar weak interaction rates of nuclei below the 132 Sn core
نویسندگان
چکیده
Shell model calculations have been done for a few valence particle and hole isotopes of Sn above 100Sn and below 132Sn cores using a CD-Bonn potential based interaction. A few matrix elements of this realistic interaction have been modified by using experimental data of the two valence neutron Sn isotope above 100Sn. Calculations with this modified interaction reproduces the enhanced B(E2,0+ → 2+) values of lighter Sn isotopes. But it seems that the interaction strength suitable for nuclei close to N = Z 100Sn may differ from that appropriate for isotopes near neutron-rich 132Sn.
منابع مشابه
Stellar weak decay rates in neutron-deficient medium-mass nuclei
Weak decay rates under stellar density and temperature conditions holding at the rapid proton-capture process are studied in neutron-deficient medium-mass waiting-point nuclei extending from Ni up to Sn. Neighboring isotopes to these waiting-point nuclei are also included in the analysis. The nuclear structure part of the problem is described within a deformed Skyrme Hartree-Fock + BCS + quasip...
متن کاملar X iv : n uc l - th / 9 81 00 61 v 1 2 2 O ct 1 99 8 Single Particle and Collective Structure for Nuclei near 132 Sn
A new Nilsson single-particle structure is proposed for neutron-rich nuclei near 132Sn. In general, a large reduction in spin–orbit interaction is required and the neutron N = 82 gap persists in the new set of parameters. The ground state deformations for several isotopic chains are studied with this set and compared with the results of the standard set and with measured ones. Collective bands ...
متن کاملSTRUCTURE OF NEUTRON - RICH NUCLEI IN THE 132 Sn REGION
We report on a study of neutron-rich nuclei around 132 Sn in terms of the shell model employing a realistic effective interaction derived from the CD-Bonn nucleon-nucleon potential. We present results for some Sb and Te isotopes. Comparison shows that our results are in very good agreement with the available experimental data supporting confidence in the predictions of our calculations. This ma...
متن کاملProjected shell model for nuclear structure and weak interaction rates
The knowledge on stellar weak interaction processes is one of the most important ingredients for resolving astrophysical questions. Study of these rates is essentially a nuclear structure problem, in which the actual decay rates are determined by the microscopic inside of nuclear many-body systems. For many astrophysically-interested questions, information on detailed nuclear level structure at...
متن کاملWeak-interaction processes during stellar collapse
Massive stars end their lifes as type II supernovae, triggered by a collapse of their central iron core with a mass of more than 1M . The general picture of a core-collapse supernova is probably well understood and has been confirmed by various observations from supernova 1987A. Nevertheless, the most sophisticated supernova simulations [1, 2, 3] currently fail to explode indicating that improv...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2008