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Calculation of 10Be & 14C Production Rates in the Solar Atmosphere: Implications for Solar Flare Spectral Index

机译:太阳大气中10Be和14C生产率的计算:太阳耀斑光谱指数的含义

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Production rates for the short-lived radionuclides 10Be (T1/2=1.36Myr) and14C(T1/2=5730 yr) in the solar atmosphere were calculated. As both radionuclides are produced through spallation reaction of solar energetic particles (SEP) with oxygen as the primary target, the prevalence of each radionuclide is linked. For the calculations, we assumed power law distribution for SEP with spectral index, r, ranging from 2.5 to 4. We find the 10Be and14Cflux rate at the surface of the Sun to range from 0.007 cm﹣2.s﹣1 to 2.55 cm﹣2.s﹣1 for 10Be, and from 0.13 cm﹣2.s﹣1 to 24.13 cm﹣2.s﹣1 for14C. These radio-nuclides are then entrained in the solar wind. From these flux rate calculations and comparison with experimentally measured flux rates ,we find the most likely time averaged solar flare spectral index to be r = ~3.3.
机译:计算了太阳大气中短寿命放射性核素10Be(T1 / 2 = 1.36Myr)和14C(T1 / 2 = 5730 yr)的生产率。由于两种放射性核素都是通过以氧为主要靶标的太阳高能粒子(SEP)的散裂反应产生的,因此每种放射性核素的普遍性是相关的。为了进行计算,我们假设SEP的幂律分布为光谱指数r,范围为2.5至4。我们发现太阳表面的10Be和14C磁通率范围为0.007 cm﹣2.s﹣1至2.55 cm﹣。 10Be为2.s﹣1,14C为0.13 cm﹣2.s﹣1至24.13 cm﹣2.s﹣1。这些放射性核素然后被夹带在太阳风中。通过这些通量率计算并与实验测量的通量率进行比较,我们发现最可能的时间平均日照耀斑光谱指数为r =〜3.3。

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