Precise half-life measurement of the superallowed β+ emitter 38Ca

被引：20

作者：

Park, H. I. ^{[1
]}

Hardy, J. C. ^{[1
]}

Iacob, V. E. ^{[1
]}

Banu, A. ^{[1
]}

Chen, L. ^{[1
]}

Golovko, V. V. ^{[1
]}

Goodwin, J. ^{[1
]}

Horvat, V. ^{[1
]}

Nica, N. ^{[1
]}

Simmons, E. ^{[1
]}

Trache, L. ^{[1
]}

Tribble, R. E. ^{[1
]}

机构：

[1] Texas A&M Univ, Inst Cyclotron, College Stn, TX 77845 USA

来源：

PHYSICAL REVIEW C | 2011年 / 84卷 / 06期

关键词：

POSITRON DECAYS;

D O I：

10.1103/PhysRevC.84.065502

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The half-life of Ca-38, a T-Z = -1 superallowed 0(+) -> 0(+) beta(+) emitter, has been measured to be 443.77(36) ms. In our experiment, pure sources of 38Ca were produced and the decay positrons were detected in a high-efficiency 4 pi proportional gas counter. Since the beta(+) decay of Ca-38 feeds K-38(m), which is itself a superallowed beta(+) emitter, the data were analyzed as a linked parent-daughter decay. Our result, with a precision of 0.08%, is a factor of 5 improvement on the best previous result.

引用

页数：8

共 20 条

[1] Precise half-life measurements for 38Ca and 39Ca
Blank, B.
Bey, A.
Matea, I.
Souin, J.
Audirac, L.
Borge, M. J. G.
Canchel, G.
Delahaye, P.
Delalee, F.
Demonchy, C-E.
Dominguez-Reyes, R.
Fraile, L. M.
Giovinazzo, J.
Hui, Tran Trong
Huikari, J.
Lunney, D.
Munoz, F.
Pedroza, J-L.
Plaisir, C.
Serani, L.
Sturm, S.
Tengblad, O.
Wenander, F.
[J]. EUROPEAN PHYSICAL JOURNAL A, 2010, 44 (03) : 363 - 372
[2] Experiments with thermalized rare isotope beams from projectile fragmentation:: A precision mass measurement of the superallowed β emitter 38Ca -: art. no. 152501
Bollen, G
Davies, D
Facina, M
Huikari, J
Kwan, E
Lofy, PA
Morrissey, DJ
Prinke, A
Ringle, R
Savory, J
Schury, P
Schwarz, S
Sumithrarachchi, C
Sun, T
Weissman, L
[J]. PHYSICAL REVIEW LETTERS, 2006, 96 (15)
[3] Nuclear Data Sheets for A=38
Cameron, John A.
Singh, Balraj
[J]. NUCLEAR DATA SHEETS, 2008, 109 (01) : 1 - +
[4] POSITRON DECAYS OF TI-42 AND CA-38
GALLMANN, A
ASLANIDES, E
JUNDT, F
JACOBS, E
[J]. PHYSICAL REVIEW, 1969, 186 (04): : 1160 - +
[5] Ramsey method of separated oscillatory fields for high-precision penning trap mass spectrometry
George, S.
Baruah, S.
Blank, B.
Blaum, K.
Breitenfeldt, M.
Hager, U.
Herfurth, F.
Herlert, A.
Kellerbauer, A.
Kluge, H.-J.
Kretzschmar, M.
Lunney, D.
Savreux, R.
Schwarz, S.
Schweikhard, L.
Yazidjian, C.
[J]. PHYSICAL REVIEW LETTERS, 2007, 98 (16)
[6] Superallowed 0+→0+ nuclear β decays: A new survey with precision tests of the conserved vector current hypothesis and the standard model
Hardy, J. C.
Towner, I. S.
[J]. PHYSICAL REVIEW C, 2009, 79 (05):
[7] Precise half-life measurement of the superallowed β+ emitter 26Si
Iacob, V. E.
Hardy, J. C.
Banu, A.
Chen, L.
Golovko, V. V.
Goodwin, J.
Horvat, V.
Nica, N.
Park, H. I.
Trache, L.
Tribble, R. E.
[J]. PHYSICAL REVIEW C, 2010, 82 (03):
[8] Precise half-life measurements for the superallowed β+ emitters 34Ar and 34Cl
Iacob, V. E.
Hardy, J. C.
Brinkley, J. F.
Gagliardi, C. A.
Mayes, V. E.
Nica, N.
Sanchez-Vega, M.
Tabacaru, G.
Trache, L.
Tribble, R. E.
[J]. PHYSICAL REVIEW C, 2006, 74 (05):
[9] POSITRON DECAYS OF 38CA AND 38K
KAVANAGH, RW
GALLMANN, A
ASLANIDES, E
JUNDT, F
JACOBS, E
[J]. PHYSICAL REVIEW, 1968, 175 (04): : 1426 - +
[10] Accurate condensed history Monte Carlo simulation of electron transport. I. EGSnrc, the new EGS4 version
Kawrakow, I
[J]. MEDICAL PHYSICS, 2000, 27 (03) : 485 - 498

← 1 2 →