A J dependence in the (3He, α) reaction conforming new spectroscopic assignments in 14N and 13C

Ball, G.; Cerny, Joseph

doi:10.1016/0031-9163(66)91296-0

Cited by 24 publications

(2 citation statements)

References 12 publications

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“…20 However, what was thought to be j dependence in the latter reaction is now considered to be largely a Q-dependent effect. 21 Apparently the jdependent effect varies more strongly with the energy of the He 3 particles or tritons than with the energy of the a particles.…”

Section: Refmentioning

confidence: 99%

B11(He3, α)B
Dehnhard
¹
,
Williams
²
,
Yntema
³

1969
Phys. Rev.
21
0
1
0
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Differential cross sections of the B u (He 3 , a)B 10 reaction leading to seven states up to 5.2-MeV excitation energy have been measured at forward angles at an incident energy 12(He 3 ) =33 MeV. The angular distributions have been analyzed in terms of the distorted-wave Born approximation on the assumption that the direct neutron-pickup process is predominant. Relative spectroscopic factors have been extracted and are found to be in good agreement with Cohen and Kurath's theoretical predictions and with the results of the B 11 (p, d)B 10 experiment at 33.6 MeV. I. INTRODUCTIONT HE B n (d,t)B 10 reaction 1 at 21.6 MeV and the B n (p, d)B 10 reaction 2 at 18.9 MeV have revealed some inconsistencies in relative spectroscopic factors, particularly for the states at 0.717 and 2.15 MeV in B 10 . Results for the B n (p, d) reaction 3 at 155 MeV and more recently 4 at 33.6 MeV have yielded spectroscopic factors in good agreement with each other and with the theoretical predictions of Cohen and Kurath. 6 The B n (d, OB 10 reaction has also been studied at 11.8 MeV 6 and at 20 MeV, 7 the data show only poor agreement with each other, probably because of the low energy of the outgoing tritons at E d =11.8 MeV. At 20 MeV the experiment was analyzed merely with the planewave Born approximation. The B n (p, d) reaction has been studied 8 at 40 MeV with poor energy resolution. The B u (He, a) reaction has been studied previously at the rather low incident energies of 1.0-2.15 9 and 2.2-5.5 MeV. 10 Although the forward peaking and oscillatory shapes of the angular distributions seem to indicate a directreaction mechanism, the relative strengths of the transitions to the various states in B 10 are in disagreement with the values obtained from the (d, t) reaction and with theory. Distorted-wave calculations are not too meaningful for the (He 3 , a) reaction at this low

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Section: Refmentioning

confidence: 99%

B11(He3, α)B
Dehnhard
¹
,
Williams
²
,
Yntema
³

1969
Phys. Rev.
21
0
1
0
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“…12 ' 13 The identification of the analogs to these levels in 14 0 should be greatly simplified in the 14 N( 3 He,£) 14 0 reaction since it will primarily be sensitive to the (p3/2,pi/2)~1 part of the wave function, and so both levels in 14 0 should have angular distributions which are similar in shape and approximately equal in magnitude. In Fig.…”

Section: The 14 N( 3 He0 14 O Reaction and Level Assignments In 14mentioning

confidence: 99%

N14(He3

Ball

Cerny

1967

Phys. Rev.

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The 14 N( 3 He,/) 14 0 reaction has been investigated at a 3 He energy of 44.6 MeV. New levels were observed in 14 0 up to an excitation energy of 18 MeV. An investigation of the ( 3 He,/) reaction on several other nuclei in the lp shell, notably 14 C and 15 N, revealed that the shapes and relative magnitudes of the angular distributions arising from single-particle transitions appear to fall into groups which are characterized by the specific shell-model transition involved. Utilizing this effect and other data, it was possible to make most probable spin and parity assignments of

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The calculation of logft values and spectroscopic factors for nuclei in the mass range 10?15

Richter

Kock

1977

Z Physik A

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Wave functions obtained in previous shell-model calculations [1,2] for states of nuclei with masses A=10-15 are used to calculate logft values and spectroscopic factors. These wave functions, which were based on a modified surface delta two-body interaction, comprise the following active shell-model spaces: the lp3/2 and lp~/2 orbitals for mass 10 14 nuclei and restricted combinations of the lpl/2, 2Sl/2, lds/2 and ld3/2 orbitals for mass 15 nuclei, leading to four different calculations in the latter case. The calculated results support evidence that the modified surface delta interaction is a valid approximation to the effective interaction in light nuclei.

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A J dependence in the (3He, α) reaction conforming new spectroscopic assignments in 14N and 13C

Cited by 24 publications

References 12 publications

B11(He3, α)B
Dehnhard
¹
,
Williams
²
,
Yntema
³

1969
Phys. Rev.
21
0
1
0
View full text Add to dashboard Cite

B11(He3, α)B
Dehnhard
¹
,
Williams
²
,
Yntema
³

1969
Phys. Rev.
21
0
1
0
View full text Add to dashboard Cite

N14(He3

The calculation of logft values and spectroscopic factors for nuclei in the mass range 10?15

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A J dependence in the (3He, α) reaction conforming new spectroscopic assignments in 14N and 13C

Cited by 24 publications

References 12 publications

B11(He3, α)BDehnhard1, Williams2, Yntema3 1969Phys. Rev.21010View full textAdd to dashboardCite

B11(He3, α)BDehnhard1, Williams2, Yntema3 1969Phys. Rev.21010View full textAdd to dashboardCite

N14(He3

The calculation of logft values and spectroscopic factors for nuclei in the mass range 10?15

Contact Info

Product

Resources

About

B11(He3, α)B
Dehnhard
¹
,
Williams
²
,
Yntema
³

1969
Phys. Rev.
21
0
1
0
View full text Add to dashboard Cite

B11(He3, α)B
Dehnhard
¹
,
Williams
²
,
Yntema
³

1969
Phys. Rev.
21
0
1
0
View full text Add to dashboard Cite