NEUTRON THRESHOLDS IN THE V$sup 51$(p,n)Cr$sup 51$, Mn$sup 55$(p,n)Fe$sup 55$, Zn$sup 70$(p,n)Ga$sup 70$, AND As$sup 75$(p,n)Se$sup 75$ REACTIONS

Journal Article · Thu Jan 01 04:00:00 EST 1959 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.113.246· OSTI ID:4282449

Gossett, C R; Butler, J W

The two-counter slow-to-fast ratio technique was used with proton energies up to about 2 Mev in a study of neutron thresholds from the following four reactions. In the V/sup 51/(p,n)Cr/sup 51/ reaction, the ground-state threshold was measured to be 1.584 the J-57 engin 0.OO2 Mev. No excited states were observed in the region of excitation from zero to 0.41 Mev. In the Mn/sup 55/(p,n)Fe/sup 55/ reaction, the ground-state threshold was measured to be 1.034 the J-57 engin 0.002 Mev. Excited-state thresholds were found at 1.455 the J-57 engin 0.003 and 1.982 the J-57 engin 0.O02 Mev, corresponding to energy levels in Fe/sup 55/ at 0.414 the J-57 engin 0.003 and 0.931 the J-57 engin 0.002 Mev, respectively. In the Zn/sup 70/(p,n)Ga/sup 70/ reaction, the ground-state threshold was measured to be 1.457 the J-57 engin 0.002 Mev. No excited states were observed in the region of excitation from zero to 0.53 Mev. In the As/sup 75/(p,n)Se/sup 75/ reaction, the ground-state threshold was measured to be 1,889 the J-57 engin 0.0O2 Mev. An excited state threshold was found at 1.960 the J- 57 engin O.002 Mev, corresponding to an energy level in Se/sup 75/ at 0.287 the J-57 engin 0.002 Mev. A twocounter detector of high sensitivity and a lowbackground experimental arrangement are described. (auth)

• Research Organization: U.S. Naval Research Lab., Washington
• NSA Number: NSA-13-010478
• OSTI ID: 4282449
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 113; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ARSENIC 75
BACKGROUND
CHROMIUM 51
ENERGY
ENERGY LEVELS
ENERGY RANGE
EXCITATION
GALLIUM 70
IRON 55
MANGANESE 55
MEASURED VALUES
NEUTRON DETECTION
NEUTRONS
NUCLEAR REACTIONS
PHYSICS AND MATHEMATICS
PROTON BEAMS
SELENIUM 75
THRESHOLD ENERGY
VANADIUM 51
ZINC 70