??????????????

????????????: ?????????????? ?????????????
???	?.??.?	??? ??????	??.??	??.? (MeV)	??.??
¹⁴¹Pr	100%	Pr ???? 82 ???????????? ?????????????????
¹⁴²Pr	???????	19.12 h	β^-	2.162	¹⁴²Nd
¹⁴²Pr	???????	19.12 h	ε	0.745	¹⁴²Ce
¹⁴³Pr	???????	13.57 d	β^-	0.934	¹⁴³Nd

???????????

百度 ”虽然时光流逝已久，但是他对20路、23路等经典公交线路依旧记忆犹新，“23路能经过静安很多学校，学生们应该都没少乘。

?????????????? (????????: Praseodymium (IPA: /?pre?zio??d?mi?m/ or /?pre?sio??d?mi?m/) ??? ????????? ??????. ???? ??????? 59. ????????????? ????????????? Pr, ???? ???????????? 82 ????????? ?????.

??????????????? ????????

?????????????? ????????? ????????? ????. ??? ?????????????? ???????? ??????? ??? ????. ??? ???????????, ??????????, ???????, ?????? ??????????? ????????? ??? ???????? ?????? ?????????????, ????? ???????? ????? ???????? ??????????????. ?????? ???????????????? ???????????????? ????????????? ?????? ?????????? ????????? ???????? ?????????????.

???????????

???????? ?????????????? ????? ??????????? ?????? ?????????????????? ?????????????? ??????????????? ???????????????????.
?????????????? ???? ???????? ???????????? ??????????????. ?????? ?????????????? ????????????? ???????????? ?????????? ???????? ?????? ??????????????????????.
?????????????? ???????????????? ??????????????? ?????? ????? ??????????. .
?????? ??????? ?????????????????? ????? ?????? ????? ????????????? ??????????????????????.
????????????? ????????? ????????????? ??????????? ???????????? ????????????? ????????? (didymium) ???????? ??? ??????????????? ?????????????? ??????????????.
????????????????? ??????? ??????? ???????? ????????? (Dr. Matthew Sellars) ??????? ??????????????? ?????????????? ????? ?????????? ?????????? ????? ???????? ?????? ??? ???? ?????????? ?????????? ????????? ?????????? ??????????. ??????????
?????????????? ????? ??????? (PrNi₅) ??? ?????? ?????????? ???????? ??????? ???????????????, ??????????? ??????????? ???????? ????????? ???????????????? ???? ????????????? 1/1000 ???? ???????? ??????????? ?????????.^[1].
????????? ??????????? ????????????????? ?????????? ???????? ???????? ??????? ??????????? ????????????. Doping Praseodymium in fluoride glass can be used as single mode fiber amplifier

??????

?????????????? ??????? ????? ??????? ???????? ????? ??????? ??????????? prasios ??????? ?????? ??????? ??????????? didymos ??????? ????????? ??????? ?????????????.

1841 ????? ????????? (Mosander) ??????? ????????? ??????? ?????????? ??????? ????????? ??????? ??????????? ???????? ????????????????. 1874?? ???? ???????? ?????? (Lecoq de Boisbaudran) ??????? ???? ????????? ?????? ?????? ????????? ??????? ????? ?????? ????????. 1879?? ???????? ?? ????????????? (Lecoq de Boisbaudran) ???????????? ??????? ?????????? ??????? ????? ??????????? ??????? ???????? ??????? ?????????? ????????????????. 1885??, ????????? ?????? ???????????? ?????? ????? ???? ??????????? (Carl Auer von Welsbach]) ??????????? ??????? ?????????????? ??????????? ???? ?????????? ????????????????. ??? ???????? ???????? ???????? ?????.

?????????? ?????

????????????? ????? ????? ???????? ??? ?????? ??? ??????? ??????? ?????????????. ????????? ??????? 9.5 ????? (ppm) ????????????? ?????.

??????????

?????????????? ???????????? ???:

?????????? ???????:?????????????? ??????????.

?????????????

Naturally occurring praseodymium is composed of one stable ??????????, ¹⁴¹Pr. Thirty-eight ????????? ??????????s have been characterized with the most stable being ¹⁴³Pr with a ??????????? ????? of 13.57 days and ¹⁴²Pr with a half-life of 19.12 hours. All of the remaining ??????????? isotopes have half-lives that are less than 5.985 hours and the majority of these have half-lives that are less than 33 seconds. This element also has six meta states with the most stable being ^138mPr (t_? 2.12 hours), ^142mPr (t_? 14.6 minutes) and ^134mPr (t_? 11 minutes).

The isotopes of praseodymium range in atomic weight from 120.955 u (¹²¹Pr) to 158.955 u (¹⁵⁹Pr). The primary ??????????? before the stable isotope, ¹⁴¹Pr, is electron capture and the primary mode after is ?????? ??????. The primary decay products before ¹⁴¹Pr are element 58 (???????) isotopes and the primary products after are element 60 (???????????) isotopes.

???????????? ???????????

???? ????????? ??????? ????? ???????????????? ???????????? ??????? ??? ??????????. ????????????? ??????????? ?????????????????? ????? ????? ??????? ??????????????.

??????????? ?????????

↑ Emsley, John (2001). NATURE'S BUILDING BLOCKS. ??????????? ????????????? ?????????. pp. pp. 342. ??????????? ?????????? ??? 0-19-850341-5. {{cite book}}: |pages= has extra text (help)

Los Alamos National Laboratory – Praseodymium

???? ??????????

[1] Emsley, John (2001). NATURE'S BUILDING BLOCKS. ??????????? ????????????? ?????????. pp. pp. 342. ??????????? ?????????? ??? 0-19-850341-5. {{cite book}}: |pages= has extra text (help)

[1]

总有眼屎是什么原因	百香果有什么营养	吃无花果有什么好处和坏处	光阴是什么意思	血白细胞高是什么原因
比音勒芬是什么档次	什么是头寸	黄绿色痰液是什么感染	头晕晕的是什么原因	太虚幻境是什么意思
男人右眉毛里有痣代表什么	二月开什么花	人为什么会怕鬼	嗓子干疼是什么原因	老人住院送什么东西好
什么像什么又像什么	掉以轻心是什么意思	戒烟有什么好处	皮粉色是什么颜色	血糖高要注意什么

牛油果对身体有什么好处hcv8jop5ns8r.cn	经常吃秋葵有什么好处hcv8jop7ns0r.cn	赛字五行属什么hcv8jop5ns6r.cn	憋屎会造成什么后果clwhiglsz.com	什么是二级医院hcv9jop6ns1r.cn
斜杠青年什么意思hcv7jop6ns1r.cn	胃胀不消化吃什么药hcv8jop3ns2r.cn	64年属什么生肖hcv8jop7ns4r.cn	脊椎侧弯挂什么科hcv8jop6ns2r.cn	婴儿奶粉过敏有什么症状hcv7jop7ns2r.cn
c肽是什么hcv7jop9ns8r.cn	肝功能不全是什么意思wzqsfys.com	甲亢是什么原因hcv9jop3ns9r.cn	马车标志是什么品牌cl108k.com	1949属什么生肖hcv8jop0ns5r.cn
梦见自己洗衣服是什么意思bysq.com	中药吃多了对人体有什么伤害1949doufunao.com	食是代表什么生肖hcv9jop3ns4r.cn	农历六月初三是什么星座fenrenren.com	妥瑞氏症是什么病hcv8jop2ns1r.cn