Published June 1977
| Version v1
Journal article
Spins and level widths determined by nuclear resonance fluorescence measurements on 75As
Creators
- 1. Stellenbosch Univ. (South Africa). Merensky Instituut vir Fisika
Description
The lifetimes of the 822, 865 and 1075 keV levels in 75As, as well as the spins of the latter two levels, were determined by resonant scattering of gamma rays. The primary radiation from 3,000Ci and 5,000Ci 60Co sources was Compton scattered to produce gamma radiation of the desired energy for photo-excitation in 75As. The lifetimes of the three levels were found to be 2.00 ps, 0.60 ps and 0.32 ps respectively. The angular distributions of the resonantly scattered radiation from the 865 keV and 1075 keV levels are consistent with spins of 5/2 and 3/2 respectively. Lifetime values are compared with excited-core model calculations. (orig.)
Abstract (German)
Die Lebensdauern der 822, 865 und 1075 keV-Zustaende des 75As und die Spins der beiden letztgenannten Zustaende wurden durch Resonanzstreuung von Gamma-Strahlung bestimmt. Die Primaerstrahlung von 3.000 und 5.000Ci 60Co-Quellen wurde Compton-gestreut, um γ-Strahlung der gewuenschten Energie zur Photoanregegung der 75As-Kerne zu erzeugen. Fuer die Lebensdauern der drei Zustaende ergaben sich die Werte 2,00 ps, 0,60 ps und 0,32 ps. Die Winkelverteilungen der in Resonanz von den 865 keV und 1075 keV-Zustaenden gestreuten Strahlung sind mit den Spins 5/2 beziehungsweise 3/2 vertraeglich. Die Lebensdauern werden mit angeregten Core-Modellrechnungen verglichen. (orig.)Additional details
Identifiers
- DOI
- 10.1007/bf01408159;
Publishing Information
- Journal Title
- Zeitschrift f�r Physik A: Atoms and Nuclei
- Journal Volume
- 282
- Journal Issue
- 2
- Series
- Z. Phys., A.
- Journal Page Range
- 159-162
- ISSN
- 0340-2193
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 8339660
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Descriptors DEI
- ANGULAR DISTRIBUTION; ARSENIC 75; ARSENIC 75 TARGET; EXCITATION; EXCITED STATES; FLUORESCENCE; KEV RANGE 100-1000; LEVEL WIDTHS; LIFETIME; PHOTONUCLEAR REACTIONS; RESONANCE SCATTERING; SPIN
- Descriptors DEC
- ANGULAR MOMENTUM; ARSENIC ISOTOPES; DISTRIBUTION; ENERGY LEVELS; ENERGY RANGE; ENERGY-LEVEL TRANSITIONS; INELASTIC SCATTERING; INTERMEDIATE MASS NUCLEI; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; KEV RANGE; LUMINESCENCE; NUCLEAR REACTIONS; NUCLEI; ODD-EVEN NUCLEI; PARTICLE PROPERTIES; RADIOISOTOPES; SCATTERING; SECONDS LIVING RADIOISOTOPES; STABLE ISOTOPES; TARGETS
Optional Information
- Notes
- 3 figs.; 1 tab.; 10 refs.; Updated automatically by Metadata and Full-Text Enrichment Agent