Split Isobaric Analog State in : Case of Strong Isospin Mixing
Abstract
Study of βþ decay of the exotic Tz = -3=2 nucleus 55Cu, via delayed γ rays, has revealed a strongly isospin mixed doublet (4599–4579 keV) in 55Ni, which represents the fragmented and previously unknown isobaric analog of the ground state of 55Cu. The observed small log $ft$ values to both states in the doublet confirm the superallowed Fermi β decay. The near degeneracy of a pair of 3/2- levels in 55Ni results in the strong isospin mixing. The isospin mixing matrix element between the T = 3/2 and T = 1/2 levels is inferred from the experiment to be 9(1) keV, which agrees well with the matrix element of the charge symmetry breaking shell model Hamiltonian of Ormand and Brown. A precise value of the half-life of 55Cu at 57(3) ms was also obtained.
- Authors:
-
- Florida State Univ., Tallahassee, FL (United States)
- Michigan State Univ., East Lansing, MI (United States)
- Publication Date:
- Research Org.:
- Nuclear Science and Security Consortium, Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1454856
- Grant/Contract Number:
- NA0000979
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 111; Journal Issue: 26; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 74 ATOMIC AND MOLECULAR PHYSICS
Citation Formats
Tripathi, Vandana, Tabor, S. L., Volya, A., Liddick, S. N., Bender, P. C., Larson, N., Prokop, C., Suchyta, S., Tai, P. -L., and VonMoss, J. M. Split Isobaric Analog State in Ni55 : Case of Strong Isospin Mixing. United States: N. p., 2013.
Web. doi:10.1103/PhysRevLett.111.262501.
Tripathi, Vandana, Tabor, S. L., Volya, A., Liddick, S. N., Bender, P. C., Larson, N., Prokop, C., Suchyta, S., Tai, P. -L., & VonMoss, J. M. Split Isobaric Analog State in Ni55 : Case of Strong Isospin Mixing. United States. doi:10.1103/PhysRevLett.111.262501.
Tripathi, Vandana, Tabor, S. L., Volya, A., Liddick, S. N., Bender, P. C., Larson, N., Prokop, C., Suchyta, S., Tai, P. -L., and VonMoss, J. M. Thu .
"Split Isobaric Analog State in Ni55 : Case of Strong Isospin Mixing". United States. doi:10.1103/PhysRevLett.111.262501. https://www.osti.gov/servlets/purl/1454856.
@article{osti_1454856,
title = {Split Isobaric Analog State in Ni55 : Case of Strong Isospin Mixing},
author = {Tripathi, Vandana and Tabor, S. L. and Volya, A. and Liddick, S. N. and Bender, P. C. and Larson, N. and Prokop, C. and Suchyta, S. and Tai, P. -L. and VonMoss, J. M.},
abstractNote = {Study of βþ decay of the exotic Tz = -3=2 nucleus 55Cu, via delayed γ rays, has revealed a strongly isospin mixed doublet (4599–4579 keV) in 55Ni, which represents the fragmented and previously unknown isobaric analog of the ground state of 55Cu. The observed small log $ft$ values to both states in the doublet confirm the superallowed Fermi β decay. The near degeneracy of a pair of 3/2- levels in 55Ni results in the strong isospin mixing. The isospin mixing matrix element between the T = 3/2 and T = 1/2 levels is inferred from the experiment to be 9(1) keV, which agrees well with the matrix element of the charge symmetry breaking shell model Hamiltonian of Ormand and Brown. A precise value of the half-life of 55Cu at 57(3) ms was also obtained.},
doi = {10.1103/PhysRevLett.111.262501},
journal = {Physical Review Letters},
number = 26,
volume = 111,
place = {United States},
year = {2013},
month = {12}
}
Free Publicly Available Full Text
Publisher's Version of Record
Other availability
Search WorldCat to find libraries that may hold this journal
Cited by: 12 works
Citation information provided by
Web of Science
Web of Science
Figures / Tables:
FIG. 1. : (Color online) (a) Energy loss spectrum of the secondary beam observed at PIN1. (b) Time difference between a 55Cu implant and a positron detected within the same pixel in coincidence with $γ$ transitions in the daughter 55Ni. (c) High energy portion of $β$ delayed $γ$ spectrum observedmore »
All figures and tables
(4 total)
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.
Works referenced in this record:
From isotopes to the stars
journal, May 2011
- Thoennessen, Michael; Sherrill, Bradley
- Nature, Vol. 473, Issue 7345
Coulomb energy differences between high-spin states in isobaric multiplets
journal, October 2007
- Bentley, M. A.; Lenzi, S. M.
- Progress in Particle and Nuclear Physics, Vol. 59, Issue 2
Observation of a Large Atomic Parity Violation Effect in Ytterbium
journal, August 2009
- Tsigutkin, K.; Dounas-Frazer, D.; Family, A.
- Physical Review Letters, Vol. 103, Issue 7
decay and splitting of the first analog state in , , and
journal, May 1978
- Schapira, J. P.; Maison, J. M.; Rao, M. N.
- Physical Review C, Vol. 17, Issue 5
Chaotic Wave Functions and Exponential Convergence of Low-Lying Energy Eigenvalues
journal, March 1999
- Horoi, Mihai; Volya, Alexander; Zelevinsky, Vladimir
- Physical Review Letters, Vol. 82, Issue 10
�ber den Bau der Atomkerne. I
journal, January 1932
- Heisenberg, W.
- Zeitschrift f�r Physik, Vol. 77, Issue 1-2
β decay of proton-rich nucleus and astrophysical consequences
journal, October 2006
- Iacob, V. E.; Zhai, Y.; Al-Abdullah, T.
- Physical Review C, Vol. 74, Issue 4
MASS MEASUREMENT OF 45 Cr AND ITS IMPACT ON THE Ca-Sc CYCLE IN X-RAY BURSTS
journal, March 2013
- Yan, X. L.; Xu, H. S.; Litvinov, Yu. A.
- The Astrophysical Journal, Vol. 766, Issue 1
High efficiency beta-decay spectroscopy using a planar germanium double-sided strip detector
journal, November 2013
- Larson, N.; Liddick, S. N.; Bennett, M.
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 727
Empirical isospin-nonconserving hamiltonians for shell-model calculations
journal, January 1989
- Ormand, W. E.; Brown, B. A.
- Nuclear Physics A, Vol. 491, Issue 1
Coulomb displacement energies of the , mirror nuclei in the shell
journal, April 1977
- Mueller, D.; Kashy, E.; Benenson, W.
- Physical Review C, Vol. 15, Issue 4
Effective interaction for -shell nuclei
journal, May 2002
- Honma, M.; Otsuka, T.; Brown, B. A.
- Physical Review C, Vol. 65, Issue 6
Commissioning the A1900 projectile fragment separator
journal, May 2003
- Morrissey, D. J.; Sherrill, B. M.; Steiner, M.
- Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 204
The decay of proton-rich nuclei in the mass region
journal, August 2007
- Dossat, C.; Adimi, N.; Aksouh, F.
- Nuclear Physics A, Vol. 792, Issue 1-2
Variation in Displacement Energies Due to Isospin-Nonconserving Forces
journal, April 2013
- Kaneko, K.; Sun, Y.; Mizusaki, T.
- Physical Review Letters, Vol. 110, Issue 17
Thirty-two-fold segmented germanium detectors to identify γ-rays from intermediate-energy exotic beams
journal, July 2001
- Mueller, W. F.; Church, J. A.; Glasmacher, T.
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 466, Issue 3
New “USD” Hamiltonians for the shell
journal, September 2006
- Brown, B. Alex; Richter, W. A.
- Physical Review C, Vol. 74, Issue 3
A study of the (p, d) reactions on A = 12–94 nuclei by 65 MeV polarized protons
journal, July 1980
- Hosono, K.; Kondo, M.; Saito, T.
- Nuclear Physics A, Vol. 343
Delayed Proton Radioactivities
journal, December 1977
- Cerny, J.; Hardy, J. C.
- Annual Review of Nuclear Science, Vol. 27, Issue 1
Radio Frequency Fragment Separator at NSCL
journal, July 2009
- Bazin, D.; Andreev, V.; Becerril, A.
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 606, Issue 3
Digital Data Acquisition System for experiments with segmented detectors at National Superconducting Cyclotron Laboratory
journal, November 2009
- Starosta, K.; Vaman, C.; Miller, D.
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 610, Issue 3
New effective interaction for -shell nuclei and its implications for the stability of the closed core
journal, March 2004
- Honma, M.; Otsuka, T.; Brown, B. A.
- Physical Review C, Vol. 69, Issue 3
Nuclear structure and the search for collective enhancement of {\cal P\hbox{,}T} -violating Schiff moments
journal, August 2008
- Auerbach, Naftali; Zelevinsky, Vladimir
- Journal of Physics G: Nuclear and Particle Physics, Vol. 35, Issue 9
Works referencing / citing this record:
Measurement of lifetimes in
journal, February 2016
- Kirsebom, O. S.; Bender, P.; Cheeseman, A.
- Physical Review C, Vol. 93, Issue 2
Figures / Tables found in this record:
Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.