Isospin purity of T=1 states in the A=38 nuclei studied via lifetime measurements in {sup 38}K

Journal Article · Sun Jan 14 23:00:00 EST 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.75.014309· OSTI ID:20990948

Prados Estevez, F M; Bruce, A M; Taylor, M J ^[1]; Amro, H; Beausang, C W; Casten, R F; Ressler, J J ^[2]; Barton, C J ^[3]; Chandler, C; Hammond, G ^[4]

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1. School of Engineering, University of Brighton, Brighton BN2 4GJ (United Kingdom)
2. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520 (United States)
3. CLRC Daresbury Laboratory, Daresbury, Warrington WA4 4AD (United Kingdom)
4. School of Chemistry and Physics, Keele University, Staffordshire ST5 5BG (United Kingdom)

The Doppler Shift Attenuation Method was used to measure lifetimes for levels in {sup 38}K at excitation energies of 1698, 2404, 2830, 2996, and 3671 keV, populated using the {sup 40}Ca(d, {alpha}){sup 38}K reaction at a beam energy of 4.5 MeV. Values of 109(29), 95(22), 457(63), 130(40), and 160(50) fs, respectively, were measured and are compared with previous values obtained using different stopping powers. The matrix element for the transition between the J{sup {pi}}=2{sub T=1}{sup +} and 0{sub T=1}{sup +} states in this T{sub z}=0 nucleus is compared with the analogous transition in the other nuclei in the T=1 triplet, {sup 38}Ca (T{sub z}=-1) and {sup 38}Ar (T{sub z}=+1), and with the results of shell-model calculations.

• OSTI ID: 20990948
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 1 Vol. 75; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ARGON 38
CALCIUM 38
CALCIUM 40
DSA METHOD
EXCITATION
IMPURITIES
ISOSPIN
KEV RANGE
LIFETIME
MATRIX ELEMENTS
MEV RANGE
POTASSIUM 38
S STATES
SHELL MODELS
STOPPING POWER
TRIPLETS