High-Precision Half-Life Measurements for the Superallowed β+ Emitter 10C: Implications for Weak Scalar Currents

被引：14

作者：

Dunlop, M. R. ^{[1
]}

Svensson, C. E. ^{[1
]}

Ball, G. C. ^{[2
]}

Grinyer, G. F. ^{[3
]}

Leslie, J. R. ^{[4
]}

Andreoiu, C. ^{[5
]}

Austin, R. A. E. ^{[6
]}

Ballast, T. ^{[2
]}

Bender, P. C. ^{[2
]}

Bildstein, V. ^{[1
]}

Varela, A. Diaz ^{[1
]}

Dunlop, R. ^{[1
]}

Garnsworthy, A. B. ^{[2
]}

Garrett, P. E. ^{[1
]}

Hackman, G. ^{[2
]}

Hadinia, B. ^{[1
]}

Jamieson, D. S. ^{[1
]}

Laffoley, A. T. ^{[1
]}

MacLean, A. D. ^{[1
]}

Miller, D. M. ^{[2
]}

Mills, W. J. ^{[2
]}

Park, J. ^{[2
]}

Radich, A. J. ^{[1
]}

Rajabali, M. M. ^{[2
]}

Rand, E. T. ^{[1
]}

Unsworth, C. ^{[2
]}

Valencik, A. ^{[6
]}

Wang, Z. M. ^{[2
]}

Zganjar, E. F. ^{[7
]}

机构：

[1] Univ Guelph, Dept Phys, Guelph, ON N1G 2W1, Canada

[2] TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada

[3] CEA DRF CNRS IN2P3, GANIL, Bvd Henri Becquerel, F-14076 Caen, France

[4] Queens Univ, Dept Phys, Kingston, ON K7L 3N6, Canada

[5] Simon Fraser Univ, Dept Chem, Burnaby, BC V5A 1S6, Canada

[6] St Marys Univ, Dept Phys & Astron, Halifax, NS B3H 3C3, Canada

[7] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 116卷 / 17期

基金：

加拿大自然科学与工程研究理事会;

关键词：

DECAY; LIVES;

D O I：

10.1103/PhysRevLett.116.172501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Precision measurements of superallowed Fermi beta-decay transitions, particularly for the lightest superallowed emitters C-10 and O-14, set stringent limits on possible scalar current contributions to the weak interaction. In the present work, a discrepancy between recent measurements of the C-10 half-life is addressed through two high-precision half-life measurements, via gamma-ray photopeak and beta counting, that yield consistent results for the C-10 half-life of T-1/2 = 19.2969 +/- 0.0074 s and T-1/2 = 19.3009 +/- 0.0017 s, respectively. The latter is the most precise superallowed beta-decay half-life measurement reported to date and the first to achieve a relative precision below 10(-4). A fit to the world superallowed beta-decay data including the C-10 half-life measurements reported here yields b(F) = -0.0018 +/- 0.0021 (68% C.L.) for the Fierz interference term and C-S/C-V = +.0009 +/- 0.0011 for the ratio of the weak scalar to vector couplings assuming left-handed neutrinos.

引用

页数：5

共 33 条

[21] The half-life of 198Au : High-precision measurement shows no temperature dependence
J. R. Goodwin
V. V. Golovko
V. E. Iacob
J. C. Hardy
The European Physical Journal A, 2007, 34 : 271 - 274
[22] The half-life of 198Au:: High-precision measurement shows no temperature dependence
Goodwin, J. R.
Golovko, V. V.
Iacob, V. E.
Hardy, J. C.
EUROPEAN PHYSICAL JOURNAL A, 2007, 34 (03): : 271 - 274
[23] High-precision half-life measurements of the T=1/2 mirror β decays 17F and 33Cl
Grinyer, J.
Grinyer, G. F.
Babo, M.
Bouzomita, H.
Chauveau, P.
Delahaye, P.
Dubois, M.
Frigot, R.
Jardin, P.
Leboucher, C.
Maunoury, L.
Seiffert, C.
Thomas, J. C.
Traykov, E.
PHYSICAL REVIEW C, 2015, 92 (04):
[24] High-precision measurement of the half-life of 62Ga -: art. no. 015502
Blank, B
Savard, G
Döring, J
Blazhev, A
Canchel, G
Chartier, M
Henderson, D
Janas, Z
Kirchner, R
Mukha, I
Roeckl, E
Schmidt, K
Zylicz, J
PHYSICAL REVIEW C, 2004, 69 (01): : 7
[25] High-precision measurement of the 14O half-life using a mass-separated radioactive beam
Gaelens, M
Andrzejewski, J
Camps, J
Decrock, P
Huyse, M
Kruglov, K
Mueller, WF
Piechaczek, A
Severijns, N
Szerypo, J
Vancraeynest, G
Van Duppen, P
Wauters, J
EUROPEAN PHYSICAL JOURNAL A, 2001, 11 (04): : 413 - 420
[26] High-precision half-life determination for 21Na using a 4π gas-proportional counter
Finlay, P.
Laffoley, A. T.
Ball, G. C.
Bender, P. C.
Dunlop, M. R.
Dunlop, R.
Hackman, G.
Leslie, J. R.
MacLean, A. D.
Miller, D.
Moukaddam, M.
Olaizola, B.
Severijns, N.
Smith, J. K.
Southall, D.
Svensson, C. E.
PHYSICAL REVIEW C, 2017, 96 (02)
[27] High-precision measurement of the 14O half-life using a mass-separated radioactive beam
M. Gaelens
J. Andrzejewski
J. Camps
P. Decrock
M. Huyse
K. Kruglov
W.F. Mueller
A. Piechaczek
N. Severijns
J. Szerypo
G. Vancraeynest
P. Van Duppen
J. Wauters
The European Physical Journal A - Hadrons and Nuclei, 2001, 11 : 413 - 420
[28] High-precision half-life measurement for the isospin T=1/2 mirror β+ decay of 21Na
Grinyer, J.
Grinyer, G. F.
Babo, M.
Bouzomita, H.
Chauveau, P.
Delahaye, P.
Dubois, M.
Frigot, R.
Jardin, P.
Leboucher, C.
Maunoury, L.
Seiffert, C.
Thomas, J. C.
Traykov, E.
PHYSICAL REVIEW C, 2015, 91 (03):
[29] Digital beta counting and pulse-shape analysis for high-precision nuclear beta decay half-life measurements: Tested on 26Alm
Chen, L.
Hardy, J. C.
Bencomo, M.
Horvat, V.
Nica, N.
Park, H. I.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2013, 728 : 81 - 91
[30] Measurement of the half-life of 198Au in a nonmetal: High-precision measurement shows no host-material dependence
Goodwin, J. R.
Nica, N.
Iacob, V. E.
Dibidad, A.
Hardy, J. C.
PHYSICAL REVIEW C, 2010, 82 (04):

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