The 28Si(3He, 2p) and 12C(3He, 2p) reactions at 40 MeV

Stupin, David M.; Ristinen, R.A.; Schwandt, P.

doi:10.1016/0375-9474(71)90346-0

Cited by 12 publications

(3 citation statements)

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“…Inspection of the predicted angular distributions shows, further, that potential B predicts angular distributions in good agreement with the experimental data, whereas potential A predicts angular distributions with considerably deeper minima than exhibited by the data. Potential A is reasonably representative of those used by a number of authors [1][2][3][4] in this mass region. The spectroscopic factor 0.42 + 0.02 predicted by potential B is quite reasonable, and in agreement with expectations from large-basis shell-model calculations [14], which set an upper limit of 0.50.…”

Section: Analysis and Discussion Of Resultsmentioning

confidence: 99%

“…Angular distribution data are available for this reaction at 18, 20, 24.5, 35.5, and 40 MeV [2][3][4]. LMMP claim that the spectroscopic factor extracted from the fitting of these data with conventional zero-range distorted-wave Born approximation calculations (DWBA) increases by more than a factor of three as one decreases the incident 3He energy from 40 to 20 MeV.…”

Section: Introductionmentioning

confidence: 99%

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Comments on ?the (3He,d) reaction on28Si?

Coker

1975

Z Physik A

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Abstract. An assertion made in a recent paper dealing with the 2ssi(aHe, d) reaction to the 1/2 + ground state of 29p, namely that the spectroscopic factor extracted in the conventional way using DWBA analyses has a strong energy dependence, is shown to be due to a complication of inconsistent DWBA analyses by various authors, rather than being due to any intrinsic feature of the 2SSi(3He, d) reaction mechanism.

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Section: Analysis and Discussion Of Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comments on ?the (3He,d) reaction on28Si?

Coker

1975

Z Physik A

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“…As one example, future studies of single-and two-neutron pickup via such unusual spectroscopic probes as ( 3 He,a*) and ( 3 He, 5 He*), respectively, might provide new insights into our knowledge of nuclear reaction mechanisms. We would like to thank J. Walton for fabricating the large-area detectors.…”

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confidence: 99%

(α,He2) Reaction as a Spectroscopic Tool for Investigating High-Spin States

et al. 1976

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cover the uncertainty in the calibration of the proton beam polarization. Their data shown for 119° (lab) were obtained by interpolation of measurements at 117.5° and 120°. In Figs. 2 and 3 the comparison is made for the same "compound-nuclear" energies by using two energy scales for E n and E p that are connected by the relation E n = E p -1.1 MeV. Clearly the measured values of A y (0) for these two charge-symmetric reactions are identical within the accuracy of the experimental values. This is the first time n + 4 He data have been compared to the data of Bacher et at, for p + 4 He and the first illustration of the equality of A y (0) for n + 4 He and p + 4 He when they are compared in this way.In summary, the reaction 3 H(d, n) 4 Ke can now be used to provide neutron beams from 20 to 30 MeV with a polarization known to about ± 2%. Such neutron beams were used to determine the 4 He(w, rc) 4 He analyzing power A y (0) at 119° (lab) which is near the back-angle maximum. The data show that the phase shifts of Hoop and Barschall predict A y ( 119°) fairly well above 22 MeV, but not in the immediate region below the 22-MeV resonance. The angular distribution data at 20.9 MeV favor the phase-shift sets of Lisowski and Walter 9 and of Stammbach and Walter 10 over earlier sets. Comparison to 4 Ue(p,p) 4 Re experimental data at the same "compound-nuclear" energies shows that the results for the two charge-sym-Experimental systems capable of detecting nuclear reaction products in resonant final states with good efficiency and energy resolution can open up a wide range of unexplored nuclear reactions. Although at present such studies are largely confined to the detection of 8 Be nuclei/* 2 Robson 3 has pointed out many other interesting resonant systems which can be detected as reaction products. Additionally, the well known finalstate interaction in the two-nucleon 1 S 0 , T = 1 system can be utilized; in particular, this interac-metric reactions are identical within the accuracy of the measurements.

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