Quasielastic deuteron and triton knockout from lithium isotopes by intermediate-energy pions

Abramov, B. M.; Borodin, Yu. A.; Bulychjov, S. A.; Dukhovskoy, I. A.; Krutenkova, A. P.; Kulikov, V.; Martemianov, M.; Matsyuk, M.; Tarasov, V. E.; Turdakina, E. N.; Khanov, A.

doi:10.1134/1.1891197

Cited by 1 publication

(13 citation statements)

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“…The extracted 7 Li beam was delivered to a target of organic glass. The 7 Be nuclei produced at the target due to a 7 Li charge exchange reaction were focused by magnetic elements and a secondary beam was thus formed. The charges of the particles of this beam were determined by particle energy losses in a scintillation monitor.…”

Section: Exposure Of Emulsions To a 7 Be Beammentioning

confidence: 99%

“…According to the measurements of the particle charges in emulsion, the triply charged particles in the beam are about 15% of the particles with Z=4. 7 Be interactions in emulsion were sought with the aid of microscopes by selecting the particle tracks with the largest ionization density.…”

Section: Exposure Of Emulsions To a 7 Be Beammentioning

confidence: 99%

“…In order to form a 7 Be beam at the JINR Nuclotron, 7 Li nuclei were accelerated to an energy of 2.87Z GeV. The extracted 7 Li beam was delivered to a target of organic glass.…”

Section: Exposure Of Emulsions To a 7 Be Beammentioning

confidence: 99%

“…Photo-emulsion chambers assembled out of emulsion layers, the thickness and dimension of which were 550 µm and 10×20 cm 2 , respectively, were exposed to the 7 Be beam [1].…”

Section: Exposure Of Emulsions To a 7 Be Beammentioning

confidence: 99%

“…Inelastic nucleus-nucleus interactions were sought in emulsion by viewing the tracks of particles starting with their entrance into the emulsion by means of a microscope with a magnification of ×900. In order to determine the mean free path of 7 Be inelastic interactions in emulsion λ( 7 Be), use was made of 294 inelastic interactions detected over the viewed track length of 41.222 m in one emulsion chamber. Table I gives the result obtained for the 7 Be nucleus and the values of the mean free path of inelastic interactions of 6 Li and 7 Li in emulsion determined in [2,3,4,5,6].…”

Section: Sionmentioning

confidence: 99%

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Fragmentation channels of relativistic 7Be nuclei in peripheral interactions

et al. 2007

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Nuclei of 7 Li were accelerated at the JINR Nuclotron. After the charge-exchange reaction involving these nuclei at an external target a second 7 Be beam of energy 1.23A GeV was formed.This beam was used to expose photo-emulsion chambers. The mean free path for inelastic 7 Be interactions in emulsion λ=14.0±0.8 cm coincides within the errors with those for 6 Li and 7 Li nuclei.More than 10% of the 7 Be events are associated with the peripheral interactions in which the total charge of the relativistic fragments is equal to the charge of the 7 Be and in which charged mesons are not produced. An unusual ratio of the isotopes is revealed in the composition of the doubly charged 7 Be fragments: the number of 3 He fragments is twice as large as that of 4 He fragments.In 50% of peripheral interactions, a 7 Be nucleus decays to two doubly charged fragments. The present paper gives the channels of the 7 Be fragmentation to charged fragments. In 50% of events, the 7 Be fragmentation proceeds only to charged fragments involving no emission of neutrons. Of them, the 3 He+ 4 He channel dominates, the 4 He+d+p and 6 Li+p channels constitute 10% each.Two events involving no emission of neutrons are registered in the 3-body 3 He+t+p and 3 He+d+d channels. The mean free path for the coherent dissociation of relativistic 7 Be nuclei to 3 He+ 4 He is 7±1 m. The particular features of the relativistic 7 Be fragmentation in such peripheral interactions are explained by the 3 He+ 4 He 2-cluster structure of the 7 Be nucleus.PACS numbers: 21.45.+v, 23.60+e, 25.10.+s *

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Section: Exposure Of Emulsions To a 7 Be Beammentioning

confidence: 99%

Section: Exposure Of Emulsions To a 7 Be Beammentioning

confidence: 99%

“…In order to form a 7 Be beam at the JINR Nuclotron, 7 Li nuclei were accelerated to an energy of 2.87Z GeV. The extracted 7 Li beam was delivered to a target of organic glass.…”

Section: Exposure Of Emulsions To a 7 Be Beammentioning

confidence: 99%

“…Photo-emulsion chambers assembled out of emulsion layers, the thickness and dimension of which were 550 µm and 10×20 cm 2 , respectively, were exposed to the 7 Be beam [1].…”

Section: Exposure Of Emulsions To a 7 Be Beammentioning

confidence: 99%