bàn
shuāi

technical
noun

Meaning of 半衰期

半衰期 means half-life (physics); the time required for half of a radioactive substance to decay. Pronounced bàn shuāi qī.

  • half-life (physics); the time required for half of a radioactive substance to decay

Definitions & Examples

Yóu
èr-
sān2
3
de8
bàn
shuāi
cháng
shí4
5
亿
nián
 

Uranium-238 has a half-life of 4.5 billion years.

Tàn
shí-
1
de4
bàn
shuāi
yuē
wéi
qiān5
7
bǎi3
sān0
shí
 
nián
cháng
yòng
kǎo
 

Carbon-14 has a half-life of about 5,730 years and is commonly used for archaeological dating.

Duǎn
bàn
shuāi
de
fàng
shè
xìng
zhì
shuāi
jiǎn
de
gèng
kuài
 
chǔ
cún
shí
jiān
xiāng
duì
jiào
duǎn
 

Radioactive materials with short half-lives decay faster and require shorter storage periods.

xué
jiā
tōng
guò
liáng
bàn
shuāi
lái
què
dìng
yán
shí
huà
shí
de
jué
duì
nián
líng
 

Scientists determine the absolute age of rocks and fossils by measuring half-lives.

Measure Words

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