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Radiative capture of orbital electrons in the decay of /sup 7/Be

Journal Article · · Phys. Rev., C; (United States)
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The higher energy portion of the inner bremsstrahlung spectrum accompanying the allowed orbital electron capture transition in /sup 7/Be to the ground state of /sup 7/Li was measured with a single channel NaI(Tl) scintillation spectrometer. Correction for the pileup spectrum due to the 478 keV nuclear ..gamma.. rays arising from the deexcitation of the first excited state in /sup 7/Li was performed by numerical integration. The measured pulse-height distribution of the inner bremsstrahlung photons was corrected for detector response following the procedures of Liden and Starfelt and Palmer and Laslett. For energies higher than 560 keV the number of 1S + 2S bremsstrahlung photons emitted per ground state EC decay of /sup 7/Be was determined to be (6.31 +- 0.38) x 10/sup -5/. Corresponding theoretical values are 6.46 x 10/sup -5/, deduced from Martin-Glauber theory, and 6.45 x 10/sup -5/, deduced from the improved calculations of Intemann. The present result is in good agreement with the theoretical predictions. The decay energy of /sup 7/Be was determined to be 857 x 14 in agreement with the accepted atomic mass difference.

Research Organization:
Department of Physics, University of Mysore, Manasagangotri, Mysore 570 006, India
OSTI ID:
6669722
Journal Information:
Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 18:2; ISSN PRVCA
Country of Publication:
United States
Language:
English

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Related Subjects

651322* -- Nuclear Properties & Reactions
A=6-19
Experimental-- Radioactive Decay-- (-1987)
651323 -- Nuclear Properties & Reactions
A=6-19
Experimental-- Energy Levels & Transitions-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
ANGULAR MOMENTUM
BASIC INTERACTIONS
BERYLLIUM 7
BERYLLIUM ISOTOPES
BETA DECAY
BETA DECAY RADIOISOTOPES
BREMSSTRAHLUNG
DAYS LIVING RADIOISOTOPES
DECAY
ELECTROMAGNETIC RADIATION
ELECTRON CAPTURE DECAY
ELECTRON CAPTURE RADIOISOTOPES
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EVEN-ODD NUCLEI
EXCITED STATES
GROUND STATES
INTERACTIONS
INTERNAL BREMSSTRAHLUNG
ISOTOPES
LEPTONIC DECAY
LIGHT NUCLEI
NUCLEI
PARITY
PARTICLE DECAY
PARTICLE PROPERTIES
RADIATIONS
RADIOISOTOPES
SPIN
WEAK INTERACTIONS
WEAK PARTICLE DECAY