Photoneutron disintegration of $sup 40$Ar

Journal Article · Fri Jun 01 04:00:00 EDT 1973 · Can. J. Phys., v. 51, no. 11, pp. 1176-1181

OSTI ID:4332527

Jury, J W; Lodge, J I; Lokan, K H; Sherman, N K; Gellie, R W

Photoneutron energy spcctra from /sup 40/Ar were measured at bremsstrahlung end-point energies from 13 to 23 MeV in 1 MeV steps. The differential cross section at 90 deg for the reaction /sup 40/Ar( gamma ,n/sub o/ )/sup 39/Ar revealed some 26 previously unreported excited states of /sup 40/Ar in the region below 13 MeV. The envelope of these states suggests a single particle resonance involving the valence 1 f/sub 7/2/ neutrons. The measured total neutron cross section exhibits a marked change from this singie particle behavior at about 14 MeV where collective effects begin to dominate and neutrons are emitted to highly excited states of /sup 39/Ar. (auth)

• Research Organization: Trent Univ., Peterborough, Ont.
• NSA Number: NSA-29-019678
• OSTI ID: 4332527
• Journal Information: Can. J. Phys., v. 51, no. 11, pp. 1176-1181, Journal Name: Can. J. Phys., v. 51, no. 11, pp. 1176-1181; ISSN CJPHA
• Country of Publication: Canada
• Language: English

Related Subjects

*ARGON 40-- PHOTONUCLEAR REACTIONS
*PHOTONUCLEAR REACTIONS
COLLECTIVE MODEL
DIFFERENTIAL CROSS SECTIONS
EXCITED STATES
MEV RANGE 10-100
N68531 --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
39 <= A <= 58--Energy Levels & Transitions
N68551* --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
39 <= A <= 58--Nuclear Reactions & Scattering
RESONANCE
TOTAL CROSS SECTIONS