作者Hall123 (拉拉拉)
看板Physics
标题[问题] alpha衰变
时间Fri Sep 25 23:23:00 2020
【出处】自己想的
【题目】1.alpha衰变为什麽跟强作用力有关系?
【瓶颈】我们知道beta衰变跟弱作用力有关是因为原子性质改变
那alpha衰变产生He原子核跟弱力没关吗?
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※ 发信站: 批踢踢实业坊(ptt.cc), 来自: 111.82.15.154 (台湾)
※ 文章网址: https://webptt.com/cn.aspx?n=bbs/Physics/M.1601047382.A.555.html
1F：推 KBmax: alpha decay happens when the nuclear force, which is th 09/26 01:10
2F：→ KBmax: e complication of the strong interaction, cannot compen 09/26 01:10
3F：→ KBmax: sate the electrostatic repulsion between protons. There 09/26 01:10
4F：→ KBmax: fore it’s a phenomenon at nuclear level, while the bet 09/26 01:10
5F：→ KBmax: a decay, which is governed by weak interaction, is sort 09/26 01:10
6F：→ KBmax: of process at fundamental particle level. 09/26 01:10
7F：推 KBmax: roughly speaking, beta decay happens “inside” the nuc 09/26 01:20
8F：→ KBmax: leons, where strength of weak interaction is still cons 09/26 01:20
9F：→ KBmax: iderable, but alpha decay happens outside nucleons and 09/26 01:20
10F：→ KBmax: inside a nuclei, where weak interaction is negligible. 09/26 01:20
11F：→ KBmax: So we can rule out the weak interaction in alpha decay 09/26 01:20
12F：→ KBmax: process. 09/26 01:20
13F：→ KBmax: reminder: the range of weak interaction is about 1/Mw~ 09/26 01:21
14F：→ KBmax: 0.0025 fm, while the nuclear force range is about 1 fm 09/26 01:21
15F：→ KBmax: which is the size of a nuclei. 09/26 01:21
16F：→ Hall123: 了解 所以是在核内跟核外差异 09/26 01:49