Resonant absorption of the gamma radiation from the Ne22(p, γ)Na23 reaction

✍ Scribed by W.L. Mouton; P.B. Smith

• Publisher: Elsevier Science
• Year: 1960
• Weight: 492 KB
• Volume: 16
• Category: Article
• ISSN: 0029-5582
• DOI: 10.1016/s0029-5582(60)81032-2

✦ Synopsis

The gamma rays emitted in the reaction Ne 22(p, y)Na 28 at E p = 637 keY have been selectively absorbed in sodium fluoride, using the technique of collision produced Doppler shift. Resonant absorption of the 9.40 MeV gamma rays occurs at 74°.3 with respect to the proton beam direction. The instrumental resolution curve has been determined by observing the resonant absorption of the 12.33 MeV gamma radiation from the reaction A127(p, y)8i 28 at E p = 771 keV. The absorption curve for Na 23 is broader than the measured instrumental curve and therefore it has been possible to determine directly the total width of the resonauce level as 460± 360 eV. From the absorption integral, together with this value of the total width, the radiation width (r yo ) for transitions to the ground state is found to be 2.7±1.1 eV. This result is in agreement with the value r yo = 2.0± 0.5 eV, found from a yield measurement.

No definite assignment of parity can be made on the basis of the partials widths obtained.