Microscopic calculations of stellar weak interaction rates and energy losses for fp- and fpg-shell nuclei

Journal Article · Mon Nov 01 04:00:00 EST 2004 · Atomic Data and Nuclear Data Tables

DOI:https://doi.org/10.1016/j.adt.2004.09.002· OSTI ID:20687201

Nabi, Jameel-Un ^[1]; Klapdor-Kleingrothaus, Hans Volker ^[2]

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1. Faculty of Engineering Sciences, GIK Institute of Engineering Sciences and Technology, Topi 23460 (Pakistan)
2. Max-Planck-Institut fuer Kernphysik, 69029 Heidelberg (Germany)

Nuclear weak interaction rates for fp- and fpg-shell nuclei in stellar matter and the associated energy losses are calculated using a modified form of proton-neutron quasiparticle random phase approximation model with separable Gamow-Teller forces. The stellar weak rates are calculated over a wide range of densities (10 {rho}Y {sub e} (g cm{sup -3}) 10{sup 11}) and temperatures (10{sup 7} T (K) 30 x 10{sup 9}). We also calculate the probability of particle emission processes in stellar environment. We present an extensive compilation of weak interaction rates in stellar matter calculated over a wide temperature-density grid and over a large mass range. The calculated capture and decay rates take into consideration the latest compilations of experimental energy levels and ft values. This paper is a follow up of our calculations introduced earlier [Eur. Phys. J. A 5 (1999) 337]. We have calculated stellar weak interaction rates for a total of 650 nuclei in the mass range A = 40-100. These also include many important neutron-rich nuclei which play an important role in the evolution process of stellar collapse.

• OSTI ID: 20687201
• Journal Information: Atomic Data and Nuclear Data Tables, Journal Name: Atomic Data and Nuclear Data Tables Journal Issue: 2 Vol. 88; ISSN ADNDAT; ISSN 0092-640X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CAPTURE
EMISSION
ENERGY LEVELS
ENERGY LOSSES
GAMOW-TELLER RULES
NEUTRON-RICH ISOTOPES
NEUTRONS
NUCLEAR DATA COLLECTIONS
NUCLEAR DECAY
PROBABILITY
PROTONS
RANDOM PHASE APPROXIMATION
STELLAR ACTIVITY
THEORETICAL DATA
WEAK INTERACTIONS