The 116Sn(d, t)115Sn reaction and the investigation of deeply bound hole states in the odd-A tin isotopes

Werf, S.Y. van der; Harakeh, Mohsen; Put, L.W.; Scholten, Olaf; Siemssen, R.H.

doi:10.1016/0375-9474(77)90526-7

Cited by 52 publications

(19 citation statements)

References 22 publications

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“…However, it should be noted that the experimental background in this region was relatively high in the present study and could have obscured weakly populated states. One would naturally expect g7/> and hll12 levels, as well as deep-lying "hole" states to be more strongly populated at higher beam energies in the (p, d) and (d, t) reactions and this appears to be the case (12,14,15,25,33). However, even at about 50 MeV beam energies, it is still the usual neutron single qp states which dominate the spectrum.…”

Section: Resultsmentioning

confidence: 99%

“…Several reports of one neutron transfer studies on the Sn isotopes have been published already (13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26), but most of these deal with isolated isotopes or just a few isotopes. While such reports are valuable as a consistency check of both experimental cross sections and extracted spectroscopic factors (Sj), there is clearly considerable importance attached to a systematic study, both experimentally and theoretically, over the whole of the Sn isotopic sequence.…”

Section: Introductionmentioning

confidence: 99%

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A 20 MeV (p, d) study of nuclear structure in the even and odd tin isotopes

Fleming¹

1982

Can. J. Phys.

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Thc nuclear structure of the cvcn and odd tin isotopcs has been studied by 20 MeV (p,d) reactions. States strongly populated in thc odd isotopcs arc due to the valcncc neutron shells and cxtcnd up to only 2 MeV of excitation cncrgy; "deep hole" states were not identified. Thc occupation probabilities extracted from finite-range distorted-wave-Born-approxin~ation calculations generally agree well with the predictions of the BCS theory of supcrconducting nuclei, particularly with the calculations of Clcmcnt and Barangcr. In the cvcn tin isotopes. strongly populated states arc characterized predominantly by L = 2 transfers extending up to 4 MeV excitation energy. Thc experimental spectroscopic factors for transitions populating even final states arc comparcd with the BCS calculatcd values of Clement and Baranger, Alzetta and Sawicki, and Van Gunstercn; relatively good agreement is obtained for L = 2 transitions, but not for L = 0 transitions. A considerable fraction of the expected sum iule L = 2 strength in "%n is missing in the ""Sn(p,d)"%n cxpcrimcntal spectrum; in like manner, no 4+ strength could be identified in either "'Sn or IlXSn.La structure nuclCairc des isotopes pairs ct imparis dc I'Ctain a CtC CtudiCc au moyen des rCactions (p,d) ii 20 MeV. Les Ctats fortcmcnt peuplCs, dans Ics isotopes impairs. sont dus aux couchcs de valence dc neutrons ct nc depassent pas 2 MeV d'knergie d'cxcitation; on n'a pas idcntifiC d'etat de "trou profond." Les probabilites d'occupation extraites de calculs effectuks a I'approximation dc Born avcc ondc distorduc et portCe fink sont gCnCralement cn bon accord avec les prCdictions de la thCorie BCS pour des noyaux supraconducteurs. particulikremcnt avec Ics calculs dc Clement et Baranger. Dans le cas des isotopes pairs dc I'Ctain. les Ctats fortcment peuplCs sont caractCrises principalemcnt par des transfcrts L = 2 s'ktcndant jusqu'i 4 MeV d'Cncrgie d'excitation. Lcs valcurs expCrirncntales dcs facteurs spcctroscopiqucs, pour Ics transitions qui peuplent les Ctats finals pairs. sont comparCes avcc lcs valcurs BCS calculCcs par Clcmcnt ct Baranger, par Alzetta ct Sawicki, ainsi que par Van Gunstcrcn: on obticnt un accord rclativerncnt bon pour les transitions L = 2, mais pas pour les transitions L = 0. Une fraction considCrablc de la forcc L = 2 selon la rkgle tlc sornrnation dans IlXSn manque dans le spectre experimental de la reaction 11') ~n (~. d ) "~S n ;dc la ~n&rnc f a~o n , aucunc force 4' n'a pu &tre idcntifibc. ni dans "'Sn, ni dans ""n.[Traduit par le journal]Can.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A 20 MeV (p, d) study of nuclear structure in the even and odd tin isotopes

Fleming¹

1982

Can. J. Phys.

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“…A possible way to attain this goal would have been the decomposition of the spectrum into several broad peaks as was done in ref. 7). It turned out however, that for the Pd isotopes this procedure would only work for the region around 2.5-3.0 MeV excitation energy where the spectra show pronounced structures.…”

Section: The (D T) Reactionmentioning

confidence: 99%

Neutron pickup reactions on the even palladium isotopes and the deeply bound hole-state excitation

et al. 1980

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“…As for 9°Zr, prominent cross sections in the low-lying region reside on states of natural parity. Since the neutron shells are only partly filled, the normal-mode OBTD's are constructed in a 0hxo + 1 hto basis, using occupation numbers from Van der Werf et al [52]. The cross section of the 2 + state at 1.294 MeV is underestimated by a factor 2 by the normal mode, reflecting that this transition receives important contributions from yet higher major shells.…”

Section: L16sn(ppt)l16sn* At 201 and 1338 Mevmentioning

confidence: 99%

“…Their overlap is small when the number of basis states is large, which is the case in practice for all but the highest spins. When evaluating the full isoscalar cross section, and thus [52]. b Estimated from systematics [58].…”

Section: Particle-hole and Normal Mode Obtd'smentioning

confidence: 99%

Localized 1ħω particle-hole strength in nuclei

et al. 1995

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General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. AbstractA cross section enhancement, persisting to high momentum transfer, has been observed around l hto in excitation energy in spectra from inelastic proton-, alpha-and electron scattering on 9°Zr, ll6Sn, 196pt and 2°spb. Data are presented for (p,p') at 201 MeV, (a,a') at 120 MeV and analyzed together with existing data obtained with 133.8 MeV polarized (l~,p') on 116Sn and electron-scattering data on Ll6Sn and ~96pt. Two different interpretations of the observed enhancement are discussed: that of the incoherent sum of all 1 hto cross section and alternatively the sum over the isoscalar normal modes of all multipolarities.Keywords: NUCLEAR REACTIONS 9°Zr, ll6Sn, 196pt, 2°spb (p,pt), E = 201 MeV; ll6Sn (polarized p,p'), E = 133.8 MeV; 9°Zr, ll6Sn, 196pt (~t, ctt), E = 120 MeV; measured o-(0), ll6Sn, 196pt (e,e~), E = 278, 333 MeV; measured form factors. 9°Zr, ll6Sn, 196pt, 2°Spb deduced 0, lhto strength distribution. DWBA calculation and effective NN-foree. A. Hofstee et al./Nuclear Physics A 588 (1995)

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The 116Sn(d, t)115Sn reaction and the investigation of deeply bound hole states in the odd-A tin isotopes

Cited by 52 publications

References 22 publications

A 20 MeV (p, d) study of nuclear structure in the even and odd tin isotopes

A 20 MeV (p, d) study of nuclear structure in the even and odd tin isotopes

Neutron pickup reactions on the even palladium isotopes and the deeply bound hole-state excitation

Localized 1ħω particle-hole strength in nuclei

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