Improvement of charge resolution for trans-iron nuclei (Z≥30) in CR-39 plastic nuclear track detectors using trajectory tracing technique

S. Ota, N. Yasuda, L. Sihver, S. Kodaira, S. Naka, Y. Ideguchi, Nobuyuki Hasebe

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    Charge identification of trans-iron nuclei (nuclear charge: Z≥ 30) using CR-39 plastic nuclear track detector (PNTD) is essential as a part of an effort to our future measurements of the projectile charge changing cross sections for galactic cosmic ray nuclei, but extremely hard. Therefore, an improvement method of the charge resolution (δZ) for 350 MeV/n Ge in CR-39 PNTD using the trajectory tracing technique with averaging the signals of nuclear tracks for each ion was studied. Eight sheets of CR-39 PNTDs were aligned and exposed to Ge beam behind a graphite target to produce projectile fragments. Average of the nuclear track data was taken over 16 detector surfaces for each ion, then the δZ of Ge was successfully improved from 0.31 charge unit on single surface to 0.15 charge unit in rms, which is good enough for making the precise cross section measurements and no other experiments using CR-39 PNTDs or the other passive detectors have achieved such a good δZ for the trans-iron nuclei with ≥Z 50 (β: relativistic velocity). This method will be very important for our future cross section measurements toward the study of galactic cosmic ray origin.

    Original languageEnglish
    Pages (from-to)495-500
    Number of pages6
    JournalAstrophysics and Space Sciences Transactions
    Volume7
    Issue number4
    DOIs
    Publication statusPublished - 2011

    Fingerprint

    tracing
    plastics
    trajectories
    iron
    nuclei
    detectors
    projectiles
    cross sections
    relativistic velocity
    ions
    graphite
    fragments

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Physics and Astronomy (miscellaneous)

    Cite this

    Improvement of charge resolution for trans-iron nuclei (Z≥30) in CR-39 plastic nuclear track detectors using trajectory tracing technique. / Ota, S.; Yasuda, N.; Sihver, L.; Kodaira, S.; Naka, S.; Ideguchi, Y.; Hasebe, Nobuyuki.

    In: Astrophysics and Space Sciences Transactions, Vol. 7, No. 4, 2011, p. 495-500.

    Research output: Contribution to journalArticle

    Ota, S. ; Yasuda, N. ; Sihver, L. ; Kodaira, S. ; Naka, S. ; Ideguchi, Y. ; Hasebe, Nobuyuki. / Improvement of charge resolution for trans-iron nuclei (Z≥30) in CR-39 plastic nuclear track detectors using trajectory tracing technique. In: Astrophysics and Space Sciences Transactions. 2011 ; Vol. 7, No. 4. pp. 495-500.
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    AU - Sihver, L.

    AU - Kodaira, S.

    AU - Naka, S.

    AU - Ideguchi, Y.

    AU - Hasebe, Nobuyuki

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