arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1607.05591astro-ph.HEhep-phnucl-ex
收藏

用铁和铅探测器探测超新星中微子

Detecting supernova neutrinos with iron and lead detectors

Abhijit Bandyopadhyay, Pijushpani Bhattacharjee, Sovan Chakraborty, Kamales Kar, Satyajit Saha

摘要:

超新星(SN)中微子可以通过带电电流(CC)和中性电流(NC)相互作用激发各种探测器材料的原子核超过其中子发射阈值。如果被探测到,发射出的中子可能是超新星事件的信号。在这里,我们提出了我们的研究结果的SN中微子探测通过中子通道的铅($^{208} {\rm Pb}$)和铁($^{56} {\rm Fe}$)探测器的现实中微子通量和能量的最近巴塞尔/达姆施塔特模拟的18太阳质量的祖SN在10千秒差距。我们发现,在一般情况下,发射的中子数每千吨的探测器材料的中微子光度和平均能量的不同的中微子物种的巴塞尔/达姆施塔特模拟显着低于先前的研究中估计的基础上早期SN模拟的结果。与此同时,我们强调了这样一个事实,即尽管铁探测器中每千吨产生的中子总数比铅低一个数量级以上,但与铅情况下$ν_e$诱导的CC事件的主导性相反,铁情况下的味盲NC事件的主导性,提供了两种探测器材料之间的互补性,使得在铅和足够大的铁探测器中同时探测SN中微子,所述铁探测器被适当地装备用于中子探测,可以允许估计SN中微子流中总的$μ$和$τ$味中微子,从而探索SN中微子的发射机制和味振荡情况。

英文摘要:

Supernova (SN) neutrinos can excite the nuclei of various detector materials beyond their neutron emission thresholds through charged current (CC) and neutral current (NC) interactions. The emitted neutrons, if detected, can be a signal for the supernova event. Here we present the results of our study of SN neutrino detection through the neutron channel in lead ($^{208} {\rm Pb}$) and iron ($^{56} {\rm Fe}$) detectors for realistic neutrino fluxes and energies given by the recent Basel/Darmstadt simulations for a 18 solar mass progenitor SN at a distance of 10 kpc. We find that, in general, the number of neutrons emitted per kTon of detector material for the neutrino luminosities and average energies of the different neutrino species as given by the Basel/Darmstadt simulations are significantly lower than those estimated in previous studies based on the results of earlier SN simulations. At the same time, we highlight the fact that, although the total number of neutrons produced per kTon in a iron detector is more than an order of magnitude lower than that for lead, the dominance of the flavor blind NC events in the case of iron, as opposed to dominance of $ν_e$ induced CC events in the case of lead, offers a complementarity between the two detector materials so that simultaneous detection of SN neutrinos in a lead and a sufficiently large iron detector suitably instrumented for neutron detection may allow estimating the fraction of the total $μ$ and $τ$ flavored neutrinos in the SN neutrino flux and thereby probing the emission mechanism as well as flavor oscillation scenarios of the SN neutrinos.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑