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

Title: High-precision Penning trap mass measurements of {sup 37,38}Ca and their contributions to conserved vector current and isobaric mass multiplet equation

Abstract

Penning trap mass measurements of the super-allowed {beta} emitter {sup 38}Ca and of {sup 37}Ca have been performed using the low-energy beam and ion trap facility at the coupled cyclotron facility of the National Superconducting Cyclotron Laboratory. Both isotopes were produced by fast-beam fragmentation and in-flight separation. The mass of {sup 38}Ca (T{sub 1/2}=440 ms) was determined with a precision of {delta}m=280 eV, corresponding to a relative mass uncertainty of {delta}m/m{approx_equal}8x10{sup -9}. A mass excess value of ME =-22508.52(28) was obtained. {sup 38}Ca is a 0{sup +}{yields}0{sup +} emitter, and the improved mass value makes it a new candidate for testing the conserved vector current hypothesis. For {sup 37}Ca (T{sub 1/2}=180 ms), a mass excess value of ME =-13135.7(1.4) was measured. Using the quadratic form of the isobaric mass multiplet equation and the improved {sup 37}Ca mass value, a precise prediction of the excitation energy of the {sup 37}Ar isobaric analog state was obtained.

Authors:
; ; ; ; ; ;  [1];  [2]; ; ;  [1];  [2]; ;  [1];  [3]
  1. National Superconducting Cyclotron Laboratory, East Lansing, Michigan 48824 (United States)
  2. (United States)
  3. Centre dEtudes Nucleaire de Bordeaux Gradnigan, Bordeaux (France)
Publication Date:
OSTI Identifier:
20995329
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 75; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevC.75.055503; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ACCURACY; ARGON 37; BEAMS; CALCIUM 37; CALCIUM 38; EQUATIONS; EV RANGE 100-1000; EXCITATION; IONS; ISOBARIC ANALOGS; MASS; SUPERCONDUCTING CYCLOTRONS; TRAPS; VECTOR CURRENTS

Citation Formats

Ringle, R., Sun, T., Bollen, G., Kwan, E., Prinke, A., Savory, J., Schury, P., Department of Physics and Astronomy, East Lansing, Michigan 48824, Davies, D., Morrissey, D. J., Sumithrarachchi, C. S., Department of Chemistry, East Lansing, Michigan 48824, Facina, M., Schwarz, S., and Huikari, J.. High-precision Penning trap mass measurements of {sup 37,38}Ca and their contributions to conserved vector current and isobaric mass multiplet equation. United States: N. p., 2007. Web. doi:10.1103/PHYSREVC.75.055503.
Ringle, R., Sun, T., Bollen, G., Kwan, E., Prinke, A., Savory, J., Schury, P., Department of Physics and Astronomy, East Lansing, Michigan 48824, Davies, D., Morrissey, D. J., Sumithrarachchi, C. S., Department of Chemistry, East Lansing, Michigan 48824, Facina, M., Schwarz, S., & Huikari, J.. High-precision Penning trap mass measurements of {sup 37,38}Ca and their contributions to conserved vector current and isobaric mass multiplet equation. United States. doi:10.1103/PHYSREVC.75.055503.
Ringle, R., Sun, T., Bollen, G., Kwan, E., Prinke, A., Savory, J., Schury, P., Department of Physics and Astronomy, East Lansing, Michigan 48824, Davies, D., Morrissey, D. J., Sumithrarachchi, C. S., Department of Chemistry, East Lansing, Michigan 48824, Facina, M., Schwarz, S., and Huikari, J.. Tue . "High-precision Penning trap mass measurements of {sup 37,38}Ca and their contributions to conserved vector current and isobaric mass multiplet equation". United States. doi:10.1103/PHYSREVC.75.055503.
@article{osti_20995329,
title = {High-precision Penning trap mass measurements of {sup 37,38}Ca and their contributions to conserved vector current and isobaric mass multiplet equation},
author = {Ringle, R. and Sun, T. and Bollen, G. and Kwan, E. and Prinke, A. and Savory, J. and Schury, P. and Department of Physics and Astronomy, East Lansing, Michigan 48824 and Davies, D. and Morrissey, D. J. and Sumithrarachchi, C. S. and Department of Chemistry, East Lansing, Michigan 48824 and Facina, M. and Schwarz, S. and Huikari, J.},
abstractNote = {Penning trap mass measurements of the super-allowed {beta} emitter {sup 38}Ca and of {sup 37}Ca have been performed using the low-energy beam and ion trap facility at the coupled cyclotron facility of the National Superconducting Cyclotron Laboratory. Both isotopes were produced by fast-beam fragmentation and in-flight separation. The mass of {sup 38}Ca (T{sub 1/2}=440 ms) was determined with a precision of {delta}m=280 eV, corresponding to a relative mass uncertainty of {delta}m/m{approx_equal}8x10{sup -9}. A mass excess value of ME =-22508.52(28) was obtained. {sup 38}Ca is a 0{sup +}{yields}0{sup +} emitter, and the improved mass value makes it a new candidate for testing the conserved vector current hypothesis. For {sup 37}Ca (T{sub 1/2}=180 ms), a mass excess value of ME =-13135.7(1.4) was measured. Using the quadratic form of the isobaric mass multiplet equation and the improved {sup 37}Ca mass value, a precise prediction of the excitation energy of the {sup 37}Ar isobaric analog state was obtained.},
doi = {10.1103/PHYSREVC.75.055503},
journal = {Physical Review. C, Nuclear Physics},
number = 5,
volume = 75,
place = {United States},
year = {Tue May 15 00:00:00 EDT 2007},
month = {Tue May 15 00:00:00 EDT 2007}
}