EXCITATION FUNCTIONS FOR THE REACTIONS INDUCED BY ALPHA PARTICLES ON Ag$sup 10$$sup 7$

Journal Article · Fri Mar 01 04:00:00 EST 1963 · Nuclear Physics (Netherlands) Divided into Nucl. Phys. A and Nucl. Phys. B

DOI:https://doi.org/10.1016/0029-5582(63)90506-6· OSTI ID:4729211

Fukushima, S; Hayashi, S; Kume, S; Okamura, H; Otozai, K; Sakamoto, K; Yoshizawa, Y

Cross sections of reactions induced by alpha particles on Ag/sup 107/ are measured up to 40 Mev by means of the radiochemical method with stacked foil targets. Observed excitation functions are for the ( alpha ,n), ( alpha ,2n), ( alpha ,3n), ( alpha ,pn), ( alpha , alpha n), and ( alpha , alpha 2n) reactions. For the ( alpha , alpha n) reaction the cross sections for one of the isomeric pair are determined. Excitation functions are calculated in terms of the statistical theory, using capture cross sections based on the diffusesurface optical model and the level density W(E) = C exp STA2{a(E - delta )} /sup 1/2/!. Adopting a = 3 Mev/sup -1/and pairing-energy values for delta , the experimental results are explained by the theory. Isomeric cross sections are obtained for the ( alpha ,n) and ( alpha ,3n) reactions. The ratios of higher spin states to lower spin states increases as the energies of alpha particles increase. The ratio is about twenty at 40 Mev for the ( alpha ,3n) reaction. (auth)

• Research Organization: Osaka Univ.
• NSA Number: NSA-17-019294
• OSTI ID: 4729211
• Journal Information: Nuclear Physics (Netherlands) Divided into Nucl. Phys. A and Nucl. Phys. B, Journal Name: Nuclear Physics (Netherlands) Divided into Nucl. Phys. A and Nucl. Phys. B Vol. Vol: 41; ISSN NUPHA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALPHA PARTICLES
CAPTURE
CROSS SECTIONS
EXCITATION
FOILS
ISOMERS
MEASURED VALUES
NEUTRONS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUMERICALS
PHYSICS
PROTONS
RADIOCHEMISTRY
SILVER 107
SPIN
STATISTICS
TARGETS