98$sup 0$ differential cross section for the reaction $sup 4$He($gamma$,n)$sup 3$He

Journal Article · Mon Oct 01 04:00:00 EDT 1973 · Phys. Rev., C, v. 8, no. 4, pp. 1211-1214

OSTI ID:4355912

Irish, J D; Johnson, R G; Berman, B L; Thomas, B J; McNeill, K G; Jury, J W

The 98 deg differential photoneutron cross section for /sub 4/He has been measured for excitation energies between 22 and 33 MeV with a liquid /sup 4/ He target at its normal boiling point and for excitation energies between 23 and 37 MeV with a /sup 4/He gas target at a pressure of 5l.6 bars. The cross section values obtained with the gas target were approximately a factor of 1.9 greater than those obtained with the liquid target. This apparent dependence of the cross-section upon the physical state of the /sup 4/He target may explan the large values for the ratio sigma ( gamma , p)/ sigma ( gamma , n) obtained by comparing photoneutron and photoproton cross sections obtained with targets in different physical states. (auth)

• Research Organization: Department of Physics, University of Toronto, Toronto, Ontario, Canada M5S 1A7
• NSA Number: NSA-29-014133
• OSTI ID: 4355912
• Journal Information: Phys. Rev., C, v. 8, no. 4, pp. 1211-1214, Journal Name: Phys. Rev., C, v. 8, no. 4, pp. 1211-1214; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

*HELIUM 4-- PHOTONUCLEAR REACTIONS
*PHOTONUCLEAR REACTIONS
DIFFERENTIAL CROSS SECTIONS
EXCITATION FUNCTIONS
GASES
HELIUM 3
LIQUIDS
MEV RANGE 10-100
N68251* --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
A <= 5--Nuclear Reactions & Scattering
PHOTONEUTRONS
TARGETS