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Il Nuovo Cimento A (1965-1970)

, Volume 77, Issue 4, pp 369–401 | Cite as

States in118Sn from117Sn(d, p)118Sn at 12 MeV

  • E. Frota-PessÔa
Article

Summary

118Sn energy levels up to ≃ 5.2 MeV excitation energy are studied in the reaction117Sn(d, p)118Sn. Deuterons had a bombarding energy of 12 MeV. The protons were analysed by a magnetic spectrograph. The detector was nuclear emulsion and the resolution in energy about 10 keV. The distorted-wave analysis was used to determinel values and spectroscopic strengths. The centres of gravity and the sums of reduced spectroscopic factors are presented for the levels when it was possible to determine theS’ value. 66 levels of excitation energy were found which did not appear in previous117Sn(d, p) reactions. 40 levels were not found previously in any reaction giving118Sn. The results are compared with the known ones.

PACS

25.10 Nuclear reactions and scattering involving few-nucleon systems 

сОстОьНИь В118Sn Иж РЕАк цИИ117Sn(d, p)118Sn пРИ 12 МЁВ

РЕжУМЕ

В РЕАкцИИ117Sn(d, p),118Sn пРИ ЁНЕР гИИ пАДАУЩИх ДЕИтРОНОВ 12 МЁВ ИсслЕДУУтсь ЁНЕРгЕт ИЧЕскИЕ УРОВНИ118Sn ВплО ть ДО ЁНЕРгИИ ВОжБУжДЕНИь 5.2 МЁВ. пРОтОНы АНАлИжИРУУт сь с пОМОЩьУ МАгНИтНО гО спЕктРОгРАФА. ДЕтЕкт ОР пРЕДстАВльЕт ьДЕРНУУ ЁМУльсИУ И РА жРЕшЕНИЕ пО ЁНЕРгИИ с ОстАВльЕт ОкОлО 10 кЁВ. Дль ОпРЕДЕлЕНИь ВЕлИЧИН ; И спЕктРОскОпИЧЕскИ х ИНтЕНсИВНОстЕИ ИспО льжУЕтсь АНАлИж ИскАжЕННых ВОлН. пРИВ ОДьтсь цЕНтРы тьжЕст И И сУММы пРИВЕДЕННых спЕктРО скОпИЧЕскИх МНОжИтЕлЕИ Дль ИсслЕ ДОВАННых УРОВНЕИ, кОг ДА ОкАжыВАЕтсь ВОжМОжН ыМ ОпРЕДЕлИть ВЕлИЧИНУ S′. БылИ ОБНАРУжЕНы 66 УР ОВНЕИ, кОтОРыЕ, пО-ВИДИМОМУ, Н Е НАБлУДАлИсь В пРЕДыД УЩИх ИсслЕДОВАНИьх Р ЕАкцИИ117Sn(d, p). Иж НИх 40 УРОВНЕИ РАНЕЕ НЕ НАБлУДАлИсь В РЕАкцИьх, кОтОРыЕ пР ИВОДьт к118Sn. пОлУЧЕННыЕ РЕжУльт Аты сРАВНИВАУтсь с ИжВЕс тНыМИ РЕжУльтАтАМИ.

Riassunto

Sono stati studiati i livelli di energia di118Sn fino ad un’energia di eccitazione di ≃5.2 MeV nella reazione117Sn(d, p)118Sn. I deuteroni avevano un’energia di bombardamento di 12 MeV. I protoni sono stati analizzati mediante uno spettrografo magnetico. II rivelatore era un’emulsione nucleare e la risoluzione in energia era di circa 10 keV. L’analisi ad onde distorte è stata usata per determinare i valori dil e le intensità spettroscopiche. Si presentant) i centri di gravità e le somme dei f attori spettroscopici ridotti per i livelli quando è possibile determinare il valore diS’. Si sono trovati 66 livelli di eccitazione che non compaiono in precedenti reazioni117Sn(d, p). 40 livelli non sono stati trovati preeedentemente in nessuna reazione che dà118Sn. Si confrontano i risultati con quelli noti.

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Reference

  1. (1).
    L. R. Norris andC. F. Moore:Phys. Rev. B,136, 40 (1964).CrossRefADSGoogle Scholar
  2. (2).
    E. J. Schneid, A. Peaskash andB. L. Cohen:Phys. Rev.,156, 1316 (1967).CrossRefADSGoogle Scholar
  3. (3).
    K. Yagi, Y. Saji, T. Ishimatsu, Y. Ishizaki, M. Matoba, Y. Nakajima andC. Y. Huang:J. Phys. Soc. Jpn.,24, 1167 (1968).CrossRefADSGoogle Scholar
  4. (4).
    J. H. Bjerregaard, O. Hansen, O. Nathan, L. Vistisen, R. Chapman andS. Hinds:Nucl. Phys. A,110, 1 (1968).CrossRefADSGoogle Scholar
  5. (5).
    D. G. Fleming, M. Blann, H. W. Fulbright andJ. A. Robbins:Nucl. Phys. A,157, 1 (1970).CrossRefADSGoogle Scholar
  6. (6).
    D. G. Fleming:Can. J. Phys.,60, 428 (1982).CrossRefADSGoogle Scholar
  7. (7).
    B. L. Cohen andR. E. Price:Phys. Rev.,123, 283 (1961).CrossRefADSGoogle Scholar
  8. (8).
    D. L. Allan, B. H. Armitage andB. A. Doran:Nucl. Phys.,66, 481 (1965).CrossRefGoogle Scholar
  9. (9).
    Y. S. Kim andB. L. Cohen:Phys. Rev.,142, 788 (1966).CrossRefADSGoogle Scholar
  10. (10).
    D. L. Allan:Nucl. Phys. A,114, 211 (1968).CrossRefADSGoogle Scholar
  11. (11).
    I. Kumabe, H. Ogata, T. H. Kim, M. Inoue, Y. Okuma andM. Matoba:J. Phys. Soc. Jpn.,25, 14 (1968).CrossRefADSGoogle Scholar
  12. (12).
    T. H. Curtis, R.A. Eisenstein, D.W. Madsen, C. K. Bockelman:Phys. Rev.,184:, 1162 (1969).CrossRefADSGoogle Scholar
  13. (13).
    G. Bruge, J. C. Faivre, H. Faraggi andA. Bussiére:Nucl. Phys. A,146, 597 (1970).CrossRefADSGoogle Scholar
  14. (14).
    O. Beer, A. El Becay, P. Lopato, Y. Terrien, G. Vallois andK. K. Seth:Nucl. Phys. A,147, 326 (1970).CrossRefADSGoogle Scholar
  15. (15).
    R. L. Robinson, P. H. Stelson, F. K. McGowan, J. L. C. Ford jr. andW. T. Milner:Nucl. Phys.,74, 281 (1965).CrossRefGoogle Scholar
  16. (16).
    J. Hattula, E. Luikkonen andJ. Kantele:Z. Phys.,231, 203 (1970).CrossRefADSGoogle Scholar
  17. (17).
    W. J. Gerace andG. C. Hamilton:Phys. Lett. B,39, 481 (1972).CrossRefADSGoogle Scholar
  18. (18).
    J. Kantele andM. Karras:Phys. Rev. B,135, 9 (1964).CrossRefADSGoogle Scholar
  19. (19).
    L. C. M. do Amaral, C. F. de Barros Leite, J. M. F. Jerontymo, A. G. de Pinho, D. Russo andS. Barros:Z. Naturforsch. Teil A,24, 1196 (1969).ADSGoogle Scholar
  20. (20).
    J. Hattula, E. Luikkonen andJ. Kantele:Nucl. Phys. A,125, 477 (1969).CrossRefADSGoogle Scholar
  21. (21).
    E. Schwarzbach andH. Munzel:Radiochim. Acta,10, 20 (1968).CrossRefGoogle Scholar
  22. (22).
    T. Yamazaki andG. T. Ewan:Nucl. Phys. A,134, 81 (1969).CrossRefADSGoogle Scholar
  23. (23).
    M. Ishihara, R. Broda andB. Herskind :Proceedings of the International Conference on Nuclear Physics, Munich, Vol.1, edited byJ. de Boer andH. J. Mang (Amsterdam, 1973), p. 256.Google Scholar
  24. (24).
    A. Van Poelgeest, J. Bron, W. H. A. Hesselink, K. Allaart, J. J. A. Zalmstra, M. J. Uitzinger andH. Verheul:Nucl. Phys. A,346, 70 (1980).CrossRefADSGoogle Scholar
  25. (25).
    T. Borello-Lewin, E. Frota-PessÔa, C. Q. Orsini, O. Dietzch andE. W. Hamburger:Rev. Bras. Fis.,2, 157 (1972).Google Scholar
  26. (26).
    T. Borello-Lewin, C. Q. Orsini, O. Dietzch andE. W. Hamburger:Nucl. Phys. A,253, 55 (1975).CrossRefGoogle Scholar
  27. (27).
    M. J. Bechara, O. Dietzch:Phys. Rev. C,12, 90 (1975).CrossRefADSGoogle Scholar
  28. (28).
    J. R. Erskine.W. W. Buechner, H. A. Enge:Phys. Rev.,128, 720 (1962).CrossRefADSGoogle Scholar
  29. (29).
    P. D. Kunz: University of Colorado distorted-wave Born approximation computer code DWUCK and instructions (unpublished).Google Scholar
  30. (30).
    C. M. Perey andF. G. Perey:At. Data Nucl. Data Tables,17, 1 (1976).CrossRefADSGoogle Scholar
  31. (31).
    R. A. Moyer: private communication.Google Scholar
  32. (32).
    V. B. Moorhead andR. A. Moyer: University of Pittsburgh, computer code SPECTRE (unpublished).Google Scholar
  33. (33).
    G. H. Carlson, W. L. Talbert jr. andS. Raman:Nucl. Data Sheets,17, 1 (1976).CrossRefADSGoogle Scholar
  34. (34).
    W. E. Frahn: IAEA, Trieste, Lectures (1969).Google Scholar
  35. (35).
    D. M. Clement andE. U. Baranger:Nucl. Phys. A,120, 25 (1968).CrossRefADSGoogle Scholar

Copyright information

© Società Italiana di Fisica 1983

Authors and Affiliations

  • E. Frota-PessÔa
    • 1
  1. 1.Centro Brasileiro de Pesquisas FisicasCBPF/CNPqBio de JaneiroRJ

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