Half-life of 44Ti as a probe for supernova models

被引：57

作者：

Gorres, J ^{[1
]}

Meissner, J

Schatz, H

Stech, E

Tischhauser, P

Wiescher, M

Bazin, D

Harkewicz, R

Hellstrom, M

Sherrill, B

Steiner, M

Boyd, RN

Buchmann, L

Hartmann, DH

Hinnefeld, JD

机构：

[1] Univ Notre Dame, Notre Dame, IN 46556 USA

[2] Michigan State Univ, E Lansing, MI 48824 USA

[3] Ohio State Univ, Columbus, OH 43210 USA

[4] TRIUMF, Vancouver, BC V6T 2A3, Canada

[5] Clemson Univ, Clemson, SC 29634 USA

[6] Indiana Univ, South Bend, IN 46634 USA

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.80.2554

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Recent measurements of galactic radioactivity with the Compton Gamma Ray Observatory reported Ti-44 activity from the supernova remnant Cassiopeia A. The absolute amount of Ti-44 provides a stringent test for current supernova models. The main uncertainty is presently the half-life of Ti-44. We report a new measurement of the half-life of Ti-44 applying a novel technique using a mixed radioactive ion beam containing Ti-44 as well as Na-22 ions. This method allows the reliable determination of the half-life of Ti-44 With high accuracy, t(1/2) = (60.3 +/- 1.3) yr. The Ti-44 abundance determined for Cassiopeia A with this half-life agrees with theoretical predictions within the observational uncertainties.

引用

页码：2554 / 2557

页数：4

共 31 条

[1] HALF-LIVES OF TI-44 AND BI-207
ALBURGER, DE
HARBOTTLE, G
[J]. PHYSICAL REVIEW C, 1990, 41 (05): : 2320 - 2324
[2] TRANSPORT INTEGRAL - A METHOD TO CALCULATE THE TIME EVOLUTION OF PHASE-SPACE DISTRIBUTIONS
BAZIN, D
SHERRILL, BM
[J]. PHYSICAL REVIEW E, 1994, 50 (05): : 4017 - 4021
[3] Burrows T. W., 1993, Nuclear Data Sheets, V68, P1, DOI 10.1006/ndsh.1993.1004
[4] Debertin K., 1988, Gammaand X-Ray Spectrometry with Semiconductor Detectors
[5] Dupraz C, 1997, ASTRON ASTROPHYS, V324, P683
[6] ENERGY-LEVELS OF A = 21-44 NUCLEI (VII)
ENDT, PM
[J]. NUCLEAR PHYSICS A, 1990, 521 : 1 - 830
[7] HALF-LIFE OF TI-44
FREKERS, D
HENNING, W
KUTSCHERA, W
REHM, KE
SMITHER, RK
YNTEMA, JL
SANTO, R
STIEVANO, B
TRAUTMANN, N
[J]. PHYSICAL REVIEW C, 1983, 28 (04): : 1756 - 1762
[8] Hartmann DH, 1997, NUCL PHYS A, V621, pC83
[9] IYUDIN AF, 1994, ASTRON ASTROPHYS, V284, pL1
[10] KURFESS JD, 1992, APJ, V399, P137

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