ANGULAR-MOMENTUM EFFECTS ON NEUTRON EMISSION BY Dy$sup 156$, Tb$sup 153$, AND Tb$sup 157$ COMPOUND NUCLEI

Technical Report · Mon Feb 26 04:00:00 EST 1962

OSTI ID:4712831

Simonoff, G N; Alexander, J M

The following reactions were studied. Pr/sup 141/(C/sup 12/,4n)Tb/sup 149g/; Nd/sup 146/(B/sup 11,8n)Tb/sup 149/; Nd/sup 144/(C/sup 12/,5n)Dy/sup 151/; Nd/su p 144/(C/sup 12/, 6n)/Dy/sup 150/; 151/; Ce/sup 140/(O/sup 16/,6n)Dy/sup 150/; and eactions, which directly produce the low-spin state of Tb/sup 149/, probably arise from compound nuclei of low angular momentum. The last six reactions have very different properties from the first two. These differences are attributed to differences in the angular momenta of the initial compound nuclei that give rise to these reactions. Excitation functions were measured or are available for all the reactions. Range distributions for the final nuclei are reported for the last six reactions. These range data give strong evidence for compound-nucleus formation. Angular distributions of the final nuclei for all the reactions are reported. From the angular distribution data the average energies of emitted photons and neutrons for each reaction are deduced. In the first two reactions the average total photon energy is less than 10 Mev. In the last six reactions the average total photon energy varies from approximately l to more than 30 Mev. (auth)

• Research Organization: California. Univ., Berkeley. Lawrence Radiation Lab.
• DOE Contract Number: W-7405-ENG-48
• NSA Number: NSA-17-011645
• OSTI ID: 4712831
• Report Number(s): UCRL-10099
• Country of Publication: United States
• Language: English

Related Subjects

ANGULAR DISTRIBUTION
BORON 11
CARBON 12
CERIUM 140
COMPOUND NUCLEI
CROSS SECTIONS
DYSPROSIUM 149
DYSPROSIUM 150
DYSPROSIUM 151
DYSPROSIUM 156
ENERGY
ENERGY RANGE
EXCITATION
EXCITATION FUNCTION
LIFETIME
MEASURED VALUES
MOMENTUM
NEODYMIUM 144
NEODYMIUM 146
NEUTRONS
NUCLEAR REACTIONS
NUCLEI
OXYGEN 16
PHOTONS
PHYSICS
PRASEODYMIUM 141
SLOWDOWN
TERBIUM 149
TERBIUM 153
TERBIUM 157