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

This content will become publicly available on May 1, 2020

Title: Isospin symmetry in B ( E 2 ) values: Coulomb excitation study of Mg 21

Abstract

The T z = -$$\frac{3}{2}$$ nucleus 21Mg has been studied by Coulomb excitation on 196Pt and 110+ ground state to the first excited $$\frac{1}{2}$$ + state in 21Mg was observed for the first time. Coulomb excitation cross-section measurements with both targets and a measurement of the half-life of the $$\frac{1}{2}$$ + state yield an adopted value of B (E2; $$\frac{5}{2}$$ + → $$\frac{1}{2}$$ +) = 13.3 (4) W.u. A new excited state at 1672(1) keV with tentative $$\frac{9}{2}$$ + assignment was also identified in 21Mg . This work demonstrates a large difference in the B (E2; $$\frac{5}{2}$$ + → $$\frac{1}{2}$$ +) value between T = $$\frac{3}{2}$$, A = 21 mirror nuclei. Lastly, the difference is investigated in the shell-model framework employing both isospin conserving and breaking USD interactions and using modern ab initio nuclear structure calculations, which have recently become applicable in the s d shell.

Authors:
 [1];  [1];  [1];  [2];  [2];  [3];  [3];  [1];  [4];  [4];  [1];  [4];  [4];  [1];  [5];  [6];  [1];  [7];  [1];  [5] more »;  [6];  [8];  [1];  [1];  [9];  [1];  [10];  [11];  [10];  [8];  [10];  [6]; ;  [1];  [1];  [5];  [10];  [5];  [1];  [7] « less
  1. TRIUMF, Vancouver, BC (Canada)
  2. Louisiana State Univ., Baton Rouge, LA (United States)
  3. Indian Inst. of Technology Roorkee, Roorkee, IN (United States)
  4. Univ. of Jyvaskyla (Finland)
  5. Simon Fraser Univ., Burnaby, BC (Canada)
  6. TRIUMF, Vancouver, BC (Canada); Univ. of British Columbia, Vancouver, BC (Canada)
  7. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  8. TRIUMF, Vancouver, BC (Canada); Univ. of Surrey, Guildford (United Kingdom)
  9. Saint Mary's Univ., Halifax, Nova Scotia (Canada)
  10. Univ. of Guelph, ON (Canada)
  11. Colorado School of Mines, Golden, CO (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1529817
Alternate Identifier(s):
OSTI ID: 1511086
Report Number(s):
LLNL-JRNL-749227
Journal ID: ISSN 2469-9985; PRVCAN; 934406
Grant/Contract Number:  
AC52-07NA27344; SC0017649
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 99; Journal Issue: 5; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Ruotsalainen, P., Henderson, J., Hackman, G., Sargsyan, G. H., Launey, K. D., Saxena, A., Srivastava, P. C., Stroberg, S. R., Grahn, T., Pakarinen, J., Ball, G. C., Julin, R., Greenlees, P. T., Smallcombe, J., Andreoiu, C., Bernier, N., Bowry, M., Buckner, M., Caballero-Folch, R., Chester, A., Cruz, S., Evitts, L. J., Frederick, R., Garnsworthy, A. B., Holl, M., Kurkjian, A., Kisliuk, D., Leach, K. G., McGee, E., Measures, J., Mücher, D., Park, J., Sarazin, F., Smith, J. K., Southall, D., Starosta, K., Svensson, C. E., Whitmore, K., Williams, M., and Wu, C. Y. Isospin symmetry in B(E2) values: Coulomb excitation study of Mg21. United States: N. p., 2019. Web. doi:10.1103/PhysRevC.99.051301.
Ruotsalainen, P., Henderson, J., Hackman, G., Sargsyan, G. H., Launey, K. D., Saxena, A., Srivastava, P. C., Stroberg, S. R., Grahn, T., Pakarinen, J., Ball, G. C., Julin, R., Greenlees, P. T., Smallcombe, J., Andreoiu, C., Bernier, N., Bowry, M., Buckner, M., Caballero-Folch, R., Chester, A., Cruz, S., Evitts, L. J., Frederick, R., Garnsworthy, A. B., Holl, M., Kurkjian, A., Kisliuk, D., Leach, K. G., McGee, E., Measures, J., Mücher, D., Park, J., Sarazin, F., Smith, J. K., Southall, D., Starosta, K., Svensson, C. E., Whitmore, K., Williams, M., & Wu, C. Y. Isospin symmetry in B(E2) values: Coulomb excitation study of Mg21. United States. doi:10.1103/PhysRevC.99.051301.
Ruotsalainen, P., Henderson, J., Hackman, G., Sargsyan, G. H., Launey, K. D., Saxena, A., Srivastava, P. C., Stroberg, S. R., Grahn, T., Pakarinen, J., Ball, G. C., Julin, R., Greenlees, P. T., Smallcombe, J., Andreoiu, C., Bernier, N., Bowry, M., Buckner, M., Caballero-Folch, R., Chester, A., Cruz, S., Evitts, L. J., Frederick, R., Garnsworthy, A. B., Holl, M., Kurkjian, A., Kisliuk, D., Leach, K. G., McGee, E., Measures, J., Mücher, D., Park, J., Sarazin, F., Smith, J. K., Southall, D., Starosta, K., Svensson, C. E., Whitmore, K., Williams, M., and Wu, C. Y. Wed . "Isospin symmetry in B(E2) values: Coulomb excitation study of Mg21". United States. doi:10.1103/PhysRevC.99.051301.
@article{osti_1529817,
title = {Isospin symmetry in B(E2) values: Coulomb excitation study of Mg21},
author = {Ruotsalainen, P. and Henderson, J. and Hackman, G. and Sargsyan, G. H. and Launey, K. D. and Saxena, A. and Srivastava, P. C. and Stroberg, S. R. and Grahn, T. and Pakarinen, J. and Ball, G. C. and Julin, R. and Greenlees, P. T. and Smallcombe, J. and Andreoiu, C. and Bernier, N. and Bowry, M. and Buckner, M. and Caballero-Folch, R. and Chester, A. and Cruz, S. and Evitts, L. J. and Frederick, R. and Garnsworthy, A. B. and Holl, M. and Kurkjian, A. and Kisliuk, D. and Leach, K. G. and McGee, E. and Measures, J. and Mücher, D. and Park, J. and Sarazin, F. and Smith, J. K. and Southall, D. and Starosta, K. and Svensson, C. E. and Whitmore, K. and Williams, M. and Wu, C. Y.},
abstractNote = {The Tz = -$\frac{3}{2}$ nucleus 21Mg has been studied by Coulomb excitation on 196Pt and 110+ ground state to the first excited $\frac{1}{2}$+ state in 21Mg was observed for the first time. Coulomb excitation cross-section measurements with both targets and a measurement of the half-life of the $\frac{1}{2}$+ state yield an adopted value of B (E2; $\frac{5}{2}$+ → $\frac{1}{2}$+) = 13.3 (4) W.u. A new excited state at 1672(1) keV with tentative $\frac{9}{2}$+ assignment was also identified in 21Mg . This work demonstrates a large difference in the B (E2; $\frac{5}{2}$+ → $\frac{1}{2}$+) value between T = $\frac{3}{2}$, A = 21 mirror nuclei. Lastly, the difference is investigated in the shell-model framework employing both isospin conserving and breaking USD interactions and using modern ab initio nuclear structure calculations, which have recently become applicable in the s d shell.},
doi = {10.1103/PhysRevC.99.051301},
journal = {Physical Review C},
number = 5,
volume = 99,
place = {United States},
year = {2019},
month = {5}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on May 1, 2020
Publisher's Version of Record

Save / Share: