Kavli Affiliate: Jing Wang
| First 5 Authors: Weifu Yin, Weifu Yin, , ,
| Summary:
The investigation and production of proton-rich iodine isotopes predominantly
rely on conventional accelerator-based methods, typically requiring prolonged
irradiation periods to measure or achieve quantifiable yields for isotopic
isolation. Bremsstrahlung radiation sources generated by high-power
laser-plasma-accelerated electron beams with ultrahigh charge (tens of
nanocoulombs) bombarding high-Z targets demonstrate extraordinary photon flux
characteristics. An electron beam with a total charge of approximately 47.7 nC
(E$_e$ $gt$ 10.4 MeV) was generated in our experiment by focusing a
ultra-intense laser pulse onto a deuterium gas jet. Laser-driven bremsstrahlung
was employed to induce $^127I$$(gamma,xn)$ ($x$ = 1,3,4,6-8), and the
product yields and the corresponding flux-weighted average cross sections are
reported. Our results demonstrate production of medical isotopes, with average
yields of $^124$I and $^123$I at approximately
$9.83pm0.45times10^5$/shot and $2.81pm0.11times10^5$/shot,
respectively. This method, utilizing high-power lasers to generate
bremsstrahlung radiation, shows significant potential for medical applications
and opens new avenues for studying photonuclear processes in astrophysical
contexts.
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