THE NUCLEAR PROPERTIES OF RHENIUM. Final Technical Report

Technical Report · Fri Mar 01 04:00:00 EST 1963

OSTI ID:4708476

Karam, R A; Parkinson, T F; Ellis, W H

The thermal neutron activation cross sections of Re/sup 185/ and Re/sup 187/ were measured and found to be 96.5 plus or minus 10 and 88 plus or minus 14 b, respectively. The effective resonance integral of natural rhenium was measured to be 694 plus or minus 28 b including the 1/v component. The (n,2n) cross sections of Re/sup 185/, Re/sup 187/ and Re/sup 185/(n 2n)Re/sup 184m/ at 14.1 Mev were measured and found to be 1.91 plus or minus 0.6, 1.44 plus or minus 0.41, and 1.12 plus or minus 0.4 b, respectively. The (n, alpha ) reaction with 14.1 Mev neutrons was investigated theoretically, and it was concluded that this reaction does not occur. The (n,p) reaction was also investigated on a theoretical basis, and it was found that this reaction is improbable with 14.1 Mev neutrons. The cross section of this reactton was calculated to be 32.2 millib. This calculation, however, could be in error by a factor of 10. The capture gamma rays reported here are the work of Groshev. The decay scheme of Re/sup 184/--Re/sup 184m/ is proposed, and the gamma rays from Au/ sup 196/ and Au/sup 196m/ were studied, Comparison of the shielding properties of rhenium and lead for thermal neutrons was made on a theoretical basis. A technique for separating gamma ray pulses from neutron pulses in NaI (Tl) detectors is also included. 43 references. (auth)

• Research Organization: Florida. Univ., Gainesville
• NSA Number: NSA-17-024380
• OSTI ID: 4708476
• Report Number(s): AD-402668
• Country of Publication: United States
• Language: English

Related Subjects

ACTIVATION
ALPHA PARTICLES
BIBLIOGRAPHY
CAPTURE
CROSS SECTIONS
DECAY
ENERGY
ENERGY RANGE
ERRORS
GAMMA RADIATION
GOLD 196
LEAD
MEASURED VALUES
NUCLEAR REACTIONS
NUCLEAR STRUCTURE
NUMERICALS
PHYSICS
PROTONS
RESONANCE ESCAPE PROBABILITY
RHENIUM 184
RHENIUM 185
RHENIUM 187
SCINTILLATION COUNTERS
THERMAL NEUTRONS