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Title: Survey of Ground State Neutron Spectroscopic Factors from Li to Cr Isotopes

Abstract

The ground state neutron spectroscopic factors for 80 nuclei ranging in Z from 3 to 24 have been extracted by analyzing the past measurements of the angular distributions from (d,p) and (p,d) reactions. We demonstrate an approach that provides systematic and consistent values with minimum assumptions. For the 61 nuclei that have been described by large-basis shell-model calculations, most experimental spectroscopic factors are reproduced to within 20%.

Authors:
;  [1];  [1];  [2]
  1. National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824 (United States)
  2. (China)
Publication Date:
OSTI Identifier:
20699607
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 95; Journal Issue: 22; Other Information: DOI: 10.1103/PhysRevLett.95.222501; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ANGULAR DISTRIBUTION; BERYLLIUM ISOTOPES; BORON ISOTOPES; CARBON ISOTOPES; CHROMIUM ISOTOPES; DEUTERON REACTIONS; DEUTERONS; GROUND STATES; LITHIUM ISOTOPES; NEUTRON SPECTROSCOPY; NEUTRONS; PROTON REACTIONS; PROTON-NUCLEON INTERACTIONS; PROTONS; SHELL MODELS; SPECTROSCOPIC FACTORS; TITANIUM ISOTOPES; VANADIUM ISOTOPES

Citation Formats

Tsang, M.B., Lynch, W.G., Lee, Jenny, and Physics Department, Chinese University of Hong Kong, Shatin, Hong Kong. Survey of Ground State Neutron Spectroscopic Factors from Li to Cr Isotopes. United States: N. p., 2005. Web. doi:10.1103/PhysRevLett.95.222501.
Tsang, M.B., Lynch, W.G., Lee, Jenny, & Physics Department, Chinese University of Hong Kong, Shatin, Hong Kong. Survey of Ground State Neutron Spectroscopic Factors from Li to Cr Isotopes. United States. doi:10.1103/PhysRevLett.95.222501.
Tsang, M.B., Lynch, W.G., Lee, Jenny, and Physics Department, Chinese University of Hong Kong, Shatin, Hong Kong. Fri . "Survey of Ground State Neutron Spectroscopic Factors from Li to Cr Isotopes". United States. doi:10.1103/PhysRevLett.95.222501.
@article{osti_20699607,
title = {Survey of Ground State Neutron Spectroscopic Factors from Li to Cr Isotopes},
author = {Tsang, M.B. and Lynch, W.G. and Lee, Jenny and Physics Department, Chinese University of Hong Kong, Shatin, Hong Kong},
abstractNote = {The ground state neutron spectroscopic factors for 80 nuclei ranging in Z from 3 to 24 have been extracted by analyzing the past measurements of the angular distributions from (d,p) and (p,d) reactions. We demonstrate an approach that provides systematic and consistent values with minimum assumptions. For the 61 nuclei that have been described by large-basis shell-model calculations, most experimental spectroscopic factors are reproduced to within 20%.},
doi = {10.1103/PhysRevLett.95.222501},
journal = {Physical Review Letters},
number = 22,
volume = 95,
place = {United States},
year = {Fri Nov 25 00:00:00 EST 2005},
month = {Fri Nov 25 00:00:00 EST 2005}
}
  • We have extracted the ground state to ground state neutron spectroscopic factors for 79 nuclei ranging in Z from 3 to 24 by analyzing the past angular distribution measurements from (d,p) and (p,d) reactions in a systematic and consistent manner using a standard parameter set. For the Ca isotopes from 40Ca to 48Ca, the spectroscopic factors follow the independent particle model predictions. For the 60 nuclei where modern shell model calculations are available, the experimental spectroscopic factors for most nuclei agree with the calculations to within 20%.
  • No abstract prepared.
  • We have extracted 565 neutron spectroscopic factors of sd and fp shell nuclei by systematically analyzing more than 2000 measured (d, p) angular distributions. We are able to compare 125 of the extracted spectroscopic factors to values predicted by large-basis shell-model calculations and evaluate the accuracies of spectroscopic factors predicted by different shell-model interactions in these regions. We find that the spectroscopic factors predicted for most excited states of sd-shell nuclei using the latest USDA or USDB interactions agree with the experimental values. For fp shell nuclei, the inability of the current models to account for the core excitation andmore » fragmentation of the states leads to considerable discrepancies. In particular, the agreement between data and shell-model predictions for Ni isotopes is not better than a factor of 2 using either the GXPF1A or the XT interaction.« less
  • 177 neutron spectroscopic factors for nickel isotopes have been extracted by performing a systematic analysis of the angular distributions measured from (d,p) transfer reactions. A subset of the extracted spectroscopic factors are compared to predictions of large-basis shell models in the full pf model space using the GXPF1A effective interaction, and the (f{sub 5/2},p{sub 3/2},p{sub 1/2},g{sub 9/2}) model space using the JJ4PNA interaction. For ground states, the predicted spectroscopic factors using the GXPF1A effective interaction in the full pf model space agree very well with the experimental values, while predictions based on several other effective interactions and model spaces aremore » about 30% higher than the experimental values. For low-energy excited states (<3.5 MeV), the agreement between the extracted spectroscopic factors and shell model calculations is not better than a factor of two.« less