[問題] alpha衰變

看板Physics作者 (拉拉拉)時間3年前 (2020/09/25 23:23), 編輯推噓2(2推 0噓 14→)
留言16則, 2人參與, 3年前最新討論串1/1
【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? -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 111.82.15.154 (臺灣) ※ 文章網址: https://www.ptt.cc/bbs/Physics/M.1601047382.A.555.html
推
09/26 01:10, 3年前 , 1F
alpha decay happens when the nuclear force, which is th
09/26 01:10, 1F
→
09/26 01:10, 3年前 , 2F
e complication of the strong interaction, cannot compen
09/26 01:10, 2F
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09/26 01:10, 3年前 , 3F
sate the electrostatic repulsion between protons. There
09/26 01:10, 3F
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09/26 01:10, 3年前 , 4F
fore it’s a phenomenon at nuclear level, while the bet
09/26 01:10, 4F
→
09/26 01:10, 3年前 , 5F
a decay, which is governed by weak interaction, is sort
09/26 01:10, 5F
→
09/26 01:10, 3年前 , 6F
of process at fundamental particle level.
09/26 01:10, 6F
推
09/26 01:20, 3年前 , 7F
roughly speaking, beta decay happens “inside” the nuc
09/26 01:20, 7F
→
09/26 01:20, 3年前 , 8F
leons, where strength of weak interaction is still cons
09/26 01:20, 8F
→
09/26 01:20, 3年前 , 9F
iderable, but alpha decay happens outside nucleons and
09/26 01:20, 9F
→
09/26 01:20, 3年前 , 10F
inside a nuclei, where weak interaction is negligible.
09/26 01:20, 10F
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09/26 01:20, 3年前 , 11F
So we can rule out the weak interaction in alpha decay
09/26 01:20, 11F
→
09/26 01:20, 3年前 , 12F
process.
09/26 01:20, 12F
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09/26 01:21, 3年前 , 13F
reminder: the range of weak interaction is about 1/Mw~
09/26 01:21, 13F
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09/26 01:21, 3年前 , 14F
0.0025 fm, while the nuclear force range is about 1 fm
09/26 01:21, 14F
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09/26 01:21, 3年前 , 15F
which is the size of a nuclei.
09/26 01:21, 15F
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09/26 01:49, 3年前 , 16F
了解 所以是在核內跟核外差異
09/26 01:49, 16F
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