Half-lives of sup 44 Ti and sup 207 Bi

Journal Article · Tue May 01 04:00:00 EDT 1990 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.41.2320· OSTI ID:6805294

Alburger, D E; Harbottle, G ^[1]

---

1. Brookhaven National Laboratory, Upton, New York 11973 (US)

An end-window gas-flow proportional counter system, including an automatic precision sample changer, was used to measure the decay of radiations from two samples of {sup 44}Ti and one of {sup 207}Bi. Comparison counts were taken on a {sup 36}Cl standard, and the ratio of counts determined the decay. Points consisted of alternate 30-min counts on each sample and on the standard, totaling 30 h on each, and were taken at intervals of about one month. Based on 3 years of counting on the {sup 207}Bi source and on one of the {sup 44}Ti sources, and 1 year on the second {sup 44}Ti sample, half-lives were obtained as follows: {sup 44}Ti, 66.6(16) yr and {sup 207}Bi, 34.9(4) yr. The {sup 207}Bi value lies between the two most recently reported values. In the case of {sup 44}Ti there are discrepancies with all three previous results including an Argonne accelerator mass spectroscopy value of 54.2(21) yr.

• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6805294
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 41:5; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651520* -- Nuclear Properties & Reactions
A=39-58
Experimental
651920 -- Nuclear Properties & Reactions
A=190-219
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BISMUTH 207
BISMUTH ISOTOPES
CHLORINE 36
CHLORINE ISOTOPES
DATA
DECAY
ELECTROMAGNETIC RADIATION
ELECTRON CAPTURE RADIOISOTOPES
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
FT VALUE
GAMMA RADIATION
HALF-LIFE
HEAVY NUCLEI
INFORMATION
INTERMEDIATE MASS NUCLEI
IONIZING RADIATIONS
ISOTOPES
LIGHT NUCLEI
MASS SPECTROMETERS
MEASURING INSTRUMENTS
NUCLEI
NUCLEOSYNTHESIS
NUMERICAL DATA
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PROPORTIONAL COUNTERS
RADIATION DETECTORS
RADIATIONS
RADIOISOTOPES
SPECTROMETERS
SYNTHESIS
TITANIUM 44
TITANIUM ISOTOPES
YEARS LIVING RADIOISOTOPES