作者Hall123 (拉拉拉)
看板Physics
標題[問題] alpha衰變
時間Fri Sep 25 23:23:00 2020
【出處】自己想的
【題目】1.alpha衰變為什麼跟強作用力有關係?
【瓶頸】我們知道beta衰變跟弱作用力有關是因為原子性質改變
那alpha衰變產生He原子核跟弱力沒關嗎?
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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 所以是在核內跟核外差異 09/26 01:49