Alpha decay of giant resonances of /sup 58,60/Ni nuclei

Journal Article · Mon Sep 01 04:00:00 EDT 1980 · Sov. J. Nucl. Phys. (Engl. Transl.); (United States)

OSTI ID:6228437

Volkov, Y M; Ignat'ev, A I; Kolomenskii, G A; Lakovichev, E F; Makhnovskii, E D; Nadtochii, A V; Popov, V V; Fominenko, V P; Chizhov, V P

Cross sections have been measured for the reactions /sup 58,60/Ni(e,e'p) and /sup 58,60/Ni(e,e'..cap alpha..) in the electron-energy range 12--35 MeV. For analysis of the experimental results we used virtual photon spectra calculated in the DWBA. At energies E..gamma.. = 16.0 +- 1.0 MeV for /sup 58/Ni and E/sub ..gamma../ = 15.6 +- 1.0 MeV for /sup 60/Ni we have observed giant electric-quadrupole resonances which decay mainly by ..cap alpha..-particle emission. The integrated cross sections for the reactions /sup 58/Ni(..gamma..,..cap alpha..) and /sup 60/Ni(..gamma..,..cap alpha..) due to E2 transitions are respectively 5.4 +- 1.4 and 6.0 +- 3.0 mbxMeV, which amounts to 47 +- 12% of the total strength of isoscalar E2 transitions for /sup 58/Ni and 56 +- 28% for /sup 60/Ni. The integrated cross sections for these same reactions due to E1 transitions are 15.9 +- 2.3 and 16.9 +- 4.8 mbxMeV, which amount to 1.7 +- 0.3% of the value given by the sum rule for electric-dipole transitions for /sup 58/Ni and 1.8 +- 0.5% for /sup 60/Ni. The measured integrated cross sections for the reactions /sup 58,60/Ni(..gamma..,p) are 539 +- 33 and 300 +- 20 mbx MeV.

• Research Organization: Leningrad Institute of Nuclear Physics, USSR Academy of Sciences
• OSTI ID: 6228437
• Journal Information: Sov. J. Nucl. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Nucl. Phys. (Engl. Transl.); (United States) Vol. 32:3; ISSN SJNCA
• Country of Publication: United States
• Language: English

Related Subjects

651625* -- Nuclear Properties & Reactions
A=59-89
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY
ALPHA PARTICLES
BARYONS
BORN APPROXIMATION
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DECAY
DWBA
E2-TRANSITIONS
ELECTRON REACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EQUATIONS
FERMIONS
GIANT RESONANCE
HADRONS
INELASTIC SCATTERING
INTEGRAL CROSS SECTIONS
LEPTON REACTIONS
MEV RANGE
MEV RANGE 10-100
MULTIPOLE TRANSITIONS
NICKEL 58 TARGET
NICKEL 60 TARGET
NUCLEAR REACTIONS
NUCLEONS
PROTONS
RESONANCE
RESONANCE SCATTERING
SCATTERING
SUM RULES
TARGETS