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Devins, D.W.; Friesel, D.L.; Jones, W.P.; Attard, A. C.; Collins, S.F.; Shute, G.G.; Spicer, B.M.; Officer, V.C.; Svalbe, I. D.; Henderson, R.; Dollhopf, W.

doi:10.1103/physrevc.24.59

Cited by 21 publications

(6 citation statements)

References 19 publications

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“…Their experiment produces similar yields for the reaction 40 Ca(γ, nγ ) 39 Ca, and the distinction between theses reactions is based on energy alone; however, as the resolution of the γ rays is 50 keV or more because of the Doppler broadening as well as the small Ge(Li) detector, the identification of a γ ray is not always unique. Nonetheness, as noted by Igo-Kemenes et al, the comparison between muon capture and the 40 Ca(γ, pγ ) 39 K reaction [5] shows great similarity, whereas the spectroscopic factors [8,10] are not a good predictor of what we observe 045501-6 TABLE IX. Yields for muon capture to specific levels in 40 K with the cascading effects removed, compared to the earlier results of Igo-Kemenes et al [3], all given as yield per capture.…”

Section: Muon Capture Results For 40 Casupporting

confidence: 54%

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γ rays from muon capture in natural Ca, Fe, and Ni

Measday

Stocki

2006

Phys. Rev. C

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A significant improvement has been made in the identification of γ rays from muon capture in natural Ca, and to a lesser extent for Fe and Ni. For calcium, capture was observed in 44 Ca and even 42 Ca, as well as the dominant 40 Ca. The (µ − , ν) reaction was clearly observed in 40 Ca, but, as in the past, no clear identification was made in Fe and Ni. The (µ − , νn) reaction was clearly observed in all nuclei, and the γ rays observed correspond better to the (γ, p) reaction than to spectroscopic factors from the (d, 3 He) or (t, α) reactions. Some (µ − , ν2n) and other reactions have been observed at a lower yield.

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Section: Muon Capture Results For 40 Casupporting

confidence: 54%

“…For the (µ − , νn) reaction we compare with a photonuclear experiment by Ullrich and Krauth [5], which was also available to Igo-Kemenes et al [3]. More recent spectroscopic factors are available from the (d, 3 He) reaction [6][7][8] and have been evaluated by Singh and Cameron (see Refs. [9,10]).…”

Section: Introductionmentioning

confidence: 99%

γ rays from muon capture in natural Ca, Fe, and Ni

Measday

Stocki

2006

Phys. Rev. C

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“…The fragment energies E i and spectroscopic factors S i were taken from Refs. [13], [14], [15], [16], [17] and [18]. The corresponding experimental spin-orbit splittings of 40 Ca are plotted on Fig.…”

Section: A Ca Isotopesmentioning

confidence: 99%

Spin-orbit splitting in nonrelativistic and relativistic self-consistent models

et al. 2000

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The splitting of single-particle energies between spin-orbit partners in nuclei is examined in the framework of different self-consistent approaches, nonrelativistic as well as relativistic. Analytical expressions of spinorbit potentials are given for various cases. Proton spin-orbit splittings are calculated along some isotopic chains ͑O, Ca, Sn͒ and they are compared with existing data. It is found that the isotopic dependence of the relativistic mean field predictions is similar to that of some Skyrme forces while the relativistic Hartree-Fock approach leads to a very different dependence due to the strong nonlocality.

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“…Secondly, two-step processes may occur in spite of the high incident energy [2]. Spectroscopic factors that small should be considered cautiously.…”

Section: Fig1mentioning

confidence: 99%

“…So far most calculations assumed a perfect proton shell closure largely based upon the results of a previous 48Ca(d,3He) experiment at 52 MeV [i] in which no evidence for ~(f,p)2(s,d)-2 configurations in the ground state of 48Ca was found, in contrast to the situation in 4~ [1,2]. We report on first direct observation of a deviation from proton shell closure in the ground state of 48Ca.…”

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confidence: 99%

Evidence for proton ground state correlations in48Ca

et al. 1984

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In a high resolution 48Ca(d,3He) experiment at 80 MeV evidence has been found for a 7/2 state at 1.97 MeV in 47K with a spectroscopic factor of C2S = 0.08 corresponding to a N 4 % admixture of ~f2(s,d) -2 configurations in the ground state of 48Ca. We report on first direct observation of a deviation from proton shell closure in the ground state of 48Ca. This observation bears among others on calculations of charge distributions, quenching of MI giant resonances and Coulomb displacement energies. So far most calculations assumed a perfect proton shell closure largely based upon the results of a previous 48Ca(d,3He) experiment at 52 MeV [i] in which no evidence for ~(f,p)2(s,d)-2 configurations in the ground state of 48Ca was found, in contrast to the situation in 4~ [1,2]. The recent interest in MI and Gamow-Teller giant resonances made a scrutiny of this assumption necessary, all the more since in the meantime evidence for a deviation from neutron shell closure of 48Ca had been reported [3]. In order to discover weak two particle-two hole components expected to be predominantly ~(f,p)2(s,d)-2 configurations in nature we utilized the 48Ca(d,3He) reaction at 80 MeV which yields good momentum matching for 1 = 1 and 1 = 3 transfer. A beam of vector polarized deuterons from the Indiana University Cyclotron Facility was directed onto a 330 Ug/cm 2 thick 48Ca target. Crucial for the success of this experiment was the low level of carbon and oxygen impurities in the target achieved by transferring the target to the scattering chamber in vacuum. In consequence, the relative size of impurity peaks in the spectra was significantly less than in the most recent study [l] of this reaction. *Present address: PhysikalischesThe emitted 3He particles were momentum analysed in a QDDM spectrograph, and detected in a position sensitive focal plane detector with an overall energy resolution of 45 keV. Spectra were taken at lab angles between 7 ~ and 34 ~ in 3 ~ steps. A sample 3He spectrum, corresponding to low excitation in the residual nucleus 47K ( fig.l) shows the population of four states of 47K, as well as other peaks which arise from the presence of carbon and oxygen impurities. 400 z 200 &8 ~ 3 ) 1,7 K CO (d, He Spin Up 8 L = 16 ~ t'TK 0.36 MeV ~K 3.42 MeV 15N 6.32 MeV ~IB 2.12 MeV 47 . . 2004~ 600 800 I0~ CHANNEL NUMBER Fig.1.A sample 3He spectrum with spin up incident deuterons.Of the four 47K states identified, three are known from the previous work [i]. These are the ground state, which is populated via 2Sl/2 proton pickup, the 0.36 MeV state (id3/2 proton pickup), and the 3.42 MeV state, which is part of a very fragmented id5/2 hole strength. The fourth state, at an excitation of 1.97 MeV, is weakly populated, and is the state of interest here. Spectroscopic factors were determined from local, zero-range DWBA calculations, using DWUCK4 and optical model parameters determined in part by fitting differential cross section and vector analyzing powers for elastic deuteron scattering which we have also measured [4]. Fig.2 sh...

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Ca40(d,He3

Cited by 21 publications

References 19 publications

γ rays from muon capture in natural Ca, Fe, and Ni

γ rays from muon capture in natural Ca, Fe, and Ni

Spin-orbit splitting in nonrelativistic and relativistic self-consistent models

Evidence for proton ground state correlations in48Ca

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