High-Resolution Study of Low-Energy Heavy Cosmic Rays with Lexan Track Detectors

Price, P. B.; Fleischer, R. L.; Peterson, D. D.; O’Ceallaigh, C.; O’Sullivan, D.; Thompson, A.

doi:10.1103/physrevlett.21.630

Cited by 59 publications

(6 citation statements)

References 8 publications

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“…10 [17] aus dem Jahre 1957, dem Jahr der letzten vergleichbaren Sonnenaktivit/it, anhand des Zahlenmaterials yon Shapiro und Silberberg [18] m6glich ist (Fig. 9).…”

Section: N(z)=p~ P2" P3" N'(z)unclassified

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Chemische Zusammensetzung der kosmischen Strahlung niederenergetischer Teilchen vonZ=12 bisZ=28, gemessen in Plastikdetektoren

Bartholomä¹,

Enge²,

Fukui³

1973

Z. Physik

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Measurement of the Chemical Composition of Low Energy Cosmic Ray Particles of Charges from Z= 12 up to Z=28 Using Plastic DetectorsResults of a balloon flight experiment flown from Fort Churchill, Canada, at 1.8 g/cm 2 for about 10 hours in 1968 are presented. The study was made using Lexan polycarbonate plastic sheets as a particle detector. The analysis of the flux and the charge composition is based on the measurement of 313 stopping particles from Mg to Ni with energies between 150 and 400 MeV/Nucl. The identification of the tracks of the particles is achieved using the restricted energy loss criterion. The flux is corrected for scanning and detector efficiency corresponding to their charge. We are able to measure the charge of a particle with an accuracy of _+ 0.3 charge units in the region of the iron peak. This accuracy depends on the detailed study of the cone length versus residual range. The even Z to odd Z ratio for charges Z__> 20 is 3. We have measured the ratios of Mn/Fe=0.34, Cr/Fe=0.42 and Ca+ Sc+Ti/Fe= 1.05. From these measured charge ratios a thickness of (3 +_ 1)g/cm 2 interstellar matter can be deduced.

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“…10 [17] aus dem Jahre 1957, dem Jahr der letzten vergleichbaren Sonnenaktivit/it, anhand des Zahlenmaterials yon Shapiro und Silberberg [18] m6glich ist (Fig. 9).…”

Section: N(z)=p~ P2" P3" N'(z)unclassified

“…gemessen. Die Identifikation der Teilchen erfolgte dutch Ausmessen der Kegellfinge als Funktion der Restreichweite [9,10].…”

unclassified

Chemische Zusammensetzung der kosmischen Strahlung niederenergetischer Teilchen vonZ=12 bisZ=28, gemessen in Plastikdetektoren

Bartholomä¹,

Enge²,

Fukui³

1973

Z. Physik

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“…¿ÕÑ ÑÊÐÂÚÂÇÕ, ÚÕÑ ÒÑÎÑÉÇÐËÇ ÚÂÔÕËÙÞ ÏÑÉÇÕ ÃÞÕß ÑÒÓÇAEÇÎÇÐÑ Ô ÕÑÚÐÑÔÕßá AEÑ ÓÂÊÏÇÓÂ ÍÂÒÎË ËÎË ÒÖÊÞÓß-ÍÂ, Õ.Ç. Ô ÕÑÚÐÑÔÕßá ÒÓËÏÇÓÐÑ AEÑ 1 ÏÏ.°AE ÐÑÌ ËÊ ÒÇÓÄÞØ ÑÃÎÂÔÕÇÌ ÒÓËÏÇÐÇÐËâ ÕÓÇÍÑÄÞØ AEÇ-ÕÇÍÕÑÓÑÄ ÃÞÎÑ ÑÒÓÇAEÇÎÇÐËÇ ÊÂÓâAEÑÄÑÅÑ ÔÒÇÍÕÓÂ âAEÇÓÐÑÅÑ ÍÑÏÒÑÐÇÐÕÂ ÒÇÓÄËÚÐÑÅÑ ÍÑÔÏËÚÇÔÍÑÅÑ ËÊÎÖÚÇÐËâ [15,16]. £ ËÔÔÎÇAEÑÄÂÐËâØ ÕâÉÈÎÑÅÑ ÍÑÏÒÑÐÇÐÕÂ ÒÇÓÄËÚÐÞØ ÍÑÔ-ÏËÚÇÔÍËØ ÎÖÚÇÌ ËÔÒÑÎßÊÑÄÂÎËÔß ÔÕÑÒÍË âAEÇÓÐÞØ àÏÖÎß-ÔËÌ [17].…”

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Nuclear track detection: advances and potential in astrophysics, particle physics and applied research

Polukhina¹

2012

Usp. Fiz. Nauk

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“…The principle of particle identification with Lexan detectors and its application to low-energy cosmic rays with 14 ^Z ^30 have been previously described. 5 Figure 1 shows some of the results of measure-…”

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High-Resolution Measurements of Slowing Cosmic Rays from Fe to U

et al. 1971

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We have identified cosmic rays with Z = 40, 44, 52, 71, 77, 78, and 92 slowing in a balloon-borne stack. The values of Z assigned by both Lexan plastic detectors and nuclear emulsions were the same to within two units. Both low-and high-energy heavy cosmic rays are synthesized in the rapid neutron-capture process.We have found that nuclei with Z up to 92 are present in the low-energy cosmic radiation. Their abundance relative to Fe is similar to that previously observed at energies above ~1 GeV/ amu. 1,2 From their large rate of change of ionization as they slow down in a detector, their atomic number and energy can be much better determined than if they were relativistic. These observations are important as a basis for understanding the origin and propagation of the cosmic rays and as a standard of comparison with results obtained from the analysis of tracks of ancient cosmic rays left in meteorites 3 and moon rocks. 4

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High-Resolution Study of Low-Energy Heavy Cosmic Rays with Lexan Track Detectors

Cited by 59 publications

References 8 publications

Chemische Zusammensetzung der kosmischen Strahlung niederenergetischer Teilchen vonZ=12 bisZ=28, gemessen in Plastikdetektoren

Chemische Zusammensetzung der kosmischen Strahlung niederenergetischer Teilchen vonZ=12 bisZ=28, gemessen in Plastikdetektoren

Nuclear track detection: advances and potential in astrophysics, particle physics and applied research

High-Resolution Measurements of Slowing Cosmic Rays from Fe to U

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