The (2I + 1) rule applied to the (d, α) reactions on Mg25 and Al27

Hansén, O.; Koltay, E.; Lund, [No Value]; Madsen, B.S.

doi:10.1016/0029-5582(64)90270-6

Cited by 37 publications

(3 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The experimental conditions and the reaction studied in the present investigation meet the various SCN energy and angular-momentum criteria for the applicability of the (27+1) rule as set down by MacDonald 38 and restated by Hansen et al 42 As discussed in Sec. III-A, the angular distributions shown in Fig.…”

Section: The (27+1) Rulementioning

confidence: 89%

“…The Al 27 (d,a)Mg 25 reaction has been studied at many deuteron energies between 1.5 and 10.5 MeV. [39][40][41][42][43] The limitations in scope and diversity in approaches of these studies preclude any summarizing conclusions other than perhaps a statement that some evidence for a (27+1) rule exists among the production cross sections associated with those Mg 25 states below 4.5 MeV which have a spin less than §. The Mg 25 (d,a)Na 23 reaction has been systematically studied at a large number of energies in the ranges 3.35 to 3.70 MeV and 7.1 to 7.7 MeV.…”

Section: The (27+1) Rulementioning

confidence: 99%

“…The Mg 25 (d,a)Na 23 reaction has been systematically studied at a large number of energies in the ranges 3.35 to 3.70 MeV and 7.1 to 7.7 MeV. 42 The energy-averaged (higher energy range), integrated cross sections for the lowlying (E<5 MeV) states of Na 23 of known spin were reported to satisfy the (27+1) rule. These investigators then assumed the general validity of the (27+1) dependence and made spin assignments for the remaining Na 23 states below 5 MeV.…”

Section: The (27+1) Rulementioning

confidence: 99%

See 2 more Smart Citations

F19(d, α)O17Reaction at 9.2 MeV

1965

View full text Add to dashboard Cite

The differential cross sections for the F l9 (d,a)0 17 reaction which leave O 17 in its ground and lowest four excited states have been measured using silicon surface-barrier detectors. Thin Teflon targets (370 to 720 jug/cm 2 )were bombarded with 9.2-MeV deuterons and alpha spectra were obtained at 46 laboratory angles between 10 and 172.5°. The five angular distributions exhibited forward and backward peaking, an over-all oscillatory structure, and minima whose magnitudes differ significantly from zero. The angular distributions are analyzed in terms of an expression which is the sum of an isotropic term and one which arises from the simultaneous action of two-nucleon pickup and heavy-par tide stripping (HPS) mechanisms. Good fits are obtained for theao, on, andau distributions, but only the gross features of thea?i and as distributions could be fitted. A discussion regarding the identification of either the pickup or the knockout mechanism as the dominant forward-angle direct-interaction process for (d,a) reactions in light nuclei is presented. It is concluded that the experimental angular distributions are fitted equally well irrespective of which one is assumed to act along with HPS. An interpretation of the differential cross sections is made which is based on the speculation that direct-interaction and statistical compound-nucleus (SCN) processes contribute incoherently. A method for the decomposition of the cross section is proposed in which the SCN contribution is assumed to be isotropic. The integrated SCN component of the cross sections is shown to be closely proportional to 2/-f-l.

show abstract

Section: The (27+1) Rulementioning

confidence: 89%