skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Nuclear structure near the doubly-magic {sup 100}Sn

Abstract

The single particle (hole) energies in {sup 100}Sn, as extrapolated by a shell model analysis of the neighboring nuclei, show a remarkable similarity to those in {sup 56}Ni, one major shell lower. This is borne out in nearly identical I{sup {pi}}=2{sup +} excitation energies, implying E(2{sup +}){approx_equal}3 MeV in {sup 100}Sn, and a large neutron effective E2 charge e{>=}1.6e. In contrast a small proton polarization charge {delta}e{<=}0.3e is found, pointing to a large isovector charge. Mean field predictions for single particle energies show substantial deviations from the experimental extrapolation. From the experimental two-proton hole spectrum in {sup 98}Cd an improved empirical interaction is extracted for the {pi}(p{sub 1/2},g{sub 9/2}) model space yielding a good description of the N=50 isotones {sup 95}Rh to {sup 98}Cd. In {sup 104}Sn, for the first time in this region, strong E3 transitions with B(E3){>=}17 W.u. were identified, indicating E(3{sup -}){approx_equal}3 MeV in {sup 100}Sn. New experimental devices, as the Ge-cluster cube and total absorption spectrometers, applied in a pioneering experiment to the {beta}{sup +}/EC decay of {sup 97}Ag, have led to a consistent picture of the Gamow-Teller quenching around {sup 100}Sn. The experimental results are discussed in the framework of various shell model approaches bymore » using both empirical and realistic interactions.« less

Authors:
; ;  [1];  [1];  [2];  [3];  [4];  [3];  [5];  [6]; ;  [7]
  1. GSI, Darmstadt (Germany)
  2. (Poland)
  3. Department of Physics, Lund University (Sweden)
  4. (Slovenia)
  5. (Italy)
  6. TSL, Uppsala (Sweden)
  7. INFN LNL Legnaro (Italy)
Publication Date:
OSTI Identifier:
21208215
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 481; Journal Issue: 1; Conference: Nuclear structure 98 conference, Gatlinburg, TN (United States), 10-15 Aug 1998; Other Information: DOI: 10.1063/1.59565; (c) 1999 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; CADMIUM 98; E3-TRANSITIONS; EXCITATION; EXTRAPOLATION; GAMOW-TELLER RULES; ISOTONIC NUCLEI; MEAN-FIELD THEORY; MEV RANGE; NICKEL 56; NUCLEAR FORCES; NUCLEAR STRUCTURE; POLARIZATION; RHODIUM 95; SHELL MODELS; SHOWER COUNTERS; SILVER 97; SINGLE-PARTICLE MODEL; TIN 100; TIN 104

Citation Formats

Grawe, H., Hu, Z., Roeckl, E., Gorska, M., IEP, University of Warsaw, Lipoglavsek, M., J. Stefan Institute, Ljubljana, Fahlander, C., INFN LNL Legnaro, Nyberg, J., Gadea, A., and De Angelis, G. Nuclear structure near the doubly-magic {sup 100}Sn. United States: N. p., 1999. Web. doi:10.1063/1.59565.
Grawe, H., Hu, Z., Roeckl, E., Gorska, M., IEP, University of Warsaw, Lipoglavsek, M., J. Stefan Institute, Ljubljana, Fahlander, C., INFN LNL Legnaro, Nyberg, J., Gadea, A., & De Angelis, G. Nuclear structure near the doubly-magic {sup 100}Sn. United States. doi:10.1063/1.59565.
Grawe, H., Hu, Z., Roeckl, E., Gorska, M., IEP, University of Warsaw, Lipoglavsek, M., J. Stefan Institute, Ljubljana, Fahlander, C., INFN LNL Legnaro, Nyberg, J., Gadea, A., and De Angelis, G. Thu . "Nuclear structure near the doubly-magic {sup 100}Sn". United States. doi:10.1063/1.59565.
@article{osti_21208215,
title = {Nuclear structure near the doubly-magic {sup 100}Sn},
author = {Grawe, H. and Hu, Z. and Roeckl, E. and Gorska, M. and IEP, University of Warsaw and Lipoglavsek, M. and J. Stefan Institute, Ljubljana and Fahlander, C. and INFN LNL Legnaro and Nyberg, J. and Gadea, A. and De Angelis, G.},
abstractNote = {The single particle (hole) energies in {sup 100}Sn, as extrapolated by a shell model analysis of the neighboring nuclei, show a remarkable similarity to those in {sup 56}Ni, one major shell lower. This is borne out in nearly identical I{sup {pi}}=2{sup +} excitation energies, implying E(2{sup +}){approx_equal}3 MeV in {sup 100}Sn, and a large neutron effective E2 charge e{>=}1.6e. In contrast a small proton polarization charge {delta}e{<=}0.3e is found, pointing to a large isovector charge. Mean field predictions for single particle energies show substantial deviations from the experimental extrapolation. From the experimental two-proton hole spectrum in {sup 98}Cd an improved empirical interaction is extracted for the {pi}(p{sub 1/2},g{sub 9/2}) model space yielding a good description of the N=50 isotones {sup 95}Rh to {sup 98}Cd. In {sup 104}Sn, for the first time in this region, strong E3 transitions with B(E3){>=}17 W.u. were identified, indicating E(3{sup -}){approx_equal}3 MeV in {sup 100}Sn. New experimental devices, as the Ge-cluster cube and total absorption spectrometers, applied in a pioneering experiment to the {beta}{sup +}/EC decay of {sup 97}Ag, have led to a consistent picture of the Gamow-Teller quenching around {sup 100}Sn. The experimental results are discussed in the framework of various shell model approaches by using both empirical and realistic interactions.},
doi = {10.1063/1.59565},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 481,
place = {United States},
year = {1999},
month = {9}
}