STUDY OF ANGULAR DISTRIBUTION OF HELIUM PROJECTILE FRAGMENTS IN INTERACTIONS OF 200 A GeV <sup>32</sup>S IONS WITH EMULSION NUCLEI
M. I. AdamovichLebedev Institute, Moscow, RussiaM. M. AggarwalPanjab University, Chandigarh, IndiaY.A. AlexandrovLebedev Institute, Moscow, RussiaN. P. AndreevaZ.V. AnzonR. AroraPanjab University, Chandigarh, IndiaF.A. AvetyanS.K. BadyalUniversity of Jammu, Jammu, IndiaE. BasovaInstitute of Nuclear Physics, Tashkent, UzbekistanK.B. BhallaUniversity of Rajasthan, Jaipur, IndiaA. BhasinUniversity of Jammu, Jammu, IndiaV.S. BhatiaPanjab University, Chandigarh, IndiaV.G. BogdanovV.G. Khlopin Radium Institute, St. Petersburg, RussiaV.I. BubnovT. H. BurnettUniversity of Washington, Seattle, Washington, USAX.D. CaiPhysical-Technical Institute, Tashkent, UzbekistanI.Ya. ChasnikovL.P. ChernovaPhysical-Technical Institute, Tashkent, UzbekistanM. M. ChernyavskyLebedev Institute, Moscow, RussiaG.Z. EligbaevaL.E. EremenkoA.S. GaitinovE. GanssaugePhilipps University, Marburg, GermanyS. GarpmanUniversity of Lund, Lund, SwedenS. GerassimovLebedev Institute, Moscow, RussiaJ. GroteUniversity of Washington, Seattle, Washington, USAK. G. GulamovPhysical-Technical Institute, Tashkent, UzbekistanS. K. GuptaUniversity of Rajasthan, Jaipur, IndiaV.K. GuptaUniversity of Jammu, Jammu, IndiaH. H. HeckmanLawrence Berkeley Laboratory, Berkeley, California, USAHao HuangHua-Zhong Normal University, Wuhan, ChinaB. JakobssonUniversity of Lund, Lund, SwedenB. JudekCarleton University, Ottawa, CanadaL. JustSafarik University, Kosice, CzechoslovakiaS. KachrooUniversity of Jammu, Jammu, IndiaG.S. KalyachkinaE.K. KanyginaM. KarabováJoint Institute for Nuclear Research, Dubna, RussiaGautam KaulUniversity of Jammu, Jammu, IndiaS. KitrooUniversity of Jammu, Jammu, IndiaS. P. KharlamovLebedev Institute, Moscow, RussiaS.A. KrasnovJoint Institute for Nuclear Research, Dubna, RussiaS. KulikovaJoint Institute for Nuclear Research, Dubna, RussiaV. KumarUniversity of Rajasthan, Jaipur, IndiaP. LalUniversity of Rajasthan, Jaipur, IndiaV.G. LarionovaLebedev Institute, Moscow, RussiaV. N. LepetanL.S. LiuPhysical-Technical Institute, Tashkent, UzbekistanS. LokanathanUniversity of Rajasthan, Jaipur, IndiaJ. LordUniversity of Washington, Seattle, Washington, USAL.S. LUKICHEVAPhysical-Technical Institute, Tashkent, UzbekistanS. LuoShanxi Normal University, Linfen, ChinaТ. Н. МаксимкинаJoint Institute for Nuclear Research, Dubna, RussiaL. K. MangotraUniversity of Jammu, Jammu, IndiaN.A. MarutyanN.V. MaslennikovaLebedev Institute, Moscow, RussiaI. S. MittraPanjab University, Chandigarh, IndiaS. MookerjeeUniversity of Rajasthan, Jaipur, IndiaH. NasrulaevaInstitute of Nuclear Physics, Tashkent, UzbekistanS.H. NasyrovInstitute of Nuclear Physics, Tashkent, UzbekistanV.S. NavotnyPhysical-Technical Institute, Tashkent, UzbekistanJ. NystrandUniversity of Lund, Lund, SwedenG. I. OrlovaLebedev Institute, Moscow, RussiaI. OtterlundUniversity of Lund, Lund, SwedenH. S. PalsaniaUniversity of Rajasthan, Jaipur, IndiaN. G. PeresadkoLebedev Institute, Moscow, RussiaN.V. PetrovInstitute of Nuclear Physics, Tashkent, UzbekistanV.A. PlyushchevV.G. Khlopin Radium Institute, St. Petersburg, RussiaD. A. QarshievInstitute of Nuclear Physics, Tashkent, UzbekistanW.Y. QianHua-Zhong Normal University, Wuhan, ChinaYangyang QinShanxi Normal University, Linfen, ChinaR. RaniwalaUniversity of Rajasthan, Jaipur, IndiaS. RaniwalaUniversity of Rajasthan, Jaipur, IndiaN.K. RaoUniversity of Jammu, Jammu, IndiaV. RappoportLebedev Institute, Moscow, RussiaJ.T. RheePhilipps University, Marburg, GermanyN. SaidkhanovPhysical-Technical Institute, Tashkent, UzbekistanN. A. SalmanovaLebedev Institute, Moscow, RussiaL.G. SarkisovaV. R. SarkisyanG.S. ShabratovaJoint Institute for Nuclear Research, Dubna, RussiaTs.I. ShakhovaS. N. ShpilevPhysical-Technical Institute, Tashkent, UzbekistanD. SkeldingUniversity of Washington, Seattle, Washington, USAK. SöderströmUniversity of Lund, Lund, SwedenZ.I. SolovjevaV.G. Khlopin Radium Institute, St. Petersburg, RussiaE. StenlundUniversity of Lund, Lund, SwedenE. L. SurinPhysical-Technical Institute, Tashkent, UzbekistanL.N. SvechnikovaPhysical-Technical Institute, Tashkent, UzbekistanK.D. TolstovJoint Institute for Nuclear Research, Dubna, RussiaMonika TóthováSafarik University, Kosice, CzechoslovakiaM.I. TretyakovaLebedev Institute, Moscow, RussiaT.P. TrofimovaInstitute of Nuclear Physics, Tashkent, UzbekistanU. TuleevaInstitute of Nuclear Physics, Tashkent, UzbekistanS. VokálJoint Institute for Nuclear Research, Dubna, RussiaH.Q. WangHua-Zhong Normal University, Wuhan, ChinaZ. WengHunan Education Institute, Changsa, ChinaR. J. WilkesUniversity of Washington, Seattle, Washington, USAYin XiaHunan Education Institute, Changsa, ChinaG. F. Xu
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Аннотация
This paper presents data on the emission of helium fragments due to break up of 200 A GeV 32 S ions in collision with emulsion nuclei. A total of 499 minimum bias events have been studied in an emulsion stack and 97 events in emulsion chambers. Emission angles of He fragments have been measured with high precision. This data has been compared with data of breakup of heavier as well as lighter projectiles and we observe that the value of the momentum spread, σ(p), increases with increasing projectile mass. The bulk part of the helium emission is consistent with a single source for helium fragments with an average excitation energy of (9.1±0.9) MeV. A tail of a few (<1%) He fragments with higher momenta is observed.
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