Neodimiyning izotoplari - Isotopes of neodymium

Ning asosiy izotoplari neodimiy  (60Nd)
IzotopChirish
mo'llikyarim hayot (t1/2)rejimimahsulot
142Nd27.2%barqaror
143Nd12.2%barqaror
144Nd23.8%2.29×1015 ya140Ce
145Nd8.3%barqaror
146Nd17.2%barqaror
148Nd5.8%barqaror
150Nd5.6%6.7×1018 yββ150Sm
Standart atom og'irligi Ar, standart(Nd)

Tabiiyki neodimiy (60Nd) 5 ta barqarordan iborat izotoplar, 142Nd, 143Nd, 145Nd, 146Nd va 148Nd, bilan 142Nd eng ko'p (27,2%) tabiiy mo'llik ) va 2 uzoq umr ko'rganlar radioizotoplar, 144Nd va 150Nd. Hammasi bo'lib 33 ta radioneodimiyning izotoplari hozirgi kungacha xarakterli bo'lib, eng barqaror tabiiy izotoplardir 144Nd (alfa yemirilishi, a yarim hayot (t1/2) ning 2.29 × 1015 yil) va 150Nd (ikki marta beta-parchalanish, t1/2 7 × 10 dan18 yil). Qolganlarning hammasi radioaktiv izotoplarning yarim umrlari 12 kundan kam, va ularning aksariyati 70 sekunddan kam bo'lgan yarim umrga ega; eng barqaror sun'iy izotop bu 147Nd 10,98 kunlik yarim umr bilan. Ushbu element ham ma'lum bo'lgan 13 ga ega meta davlatlar eng barqaror borliq bilan 139mNd (t1/2 5.5 soat), 135mNd (t1/2 5.5 daqiqa) va 133m1Nd (t1/2 ~ 70 soniya).

Birlamchi parchalanish rejimlari eng barqaror izotopdan oldin, 142Nd, bor elektronni tortib olish va pozitron yemirilishi va undan keyin asosiy rejim beta-parchalanish. Birlamchi parchalanadigan mahsulotlar oldin 142Nd element Pr (praseodimiyum ) izotoplari va undan keyingi asosiy mahsulotlar Pm elementidir (prometiy ) izotoplar.

Izotoplar ro'yxati

Nuklid
[n 1]
ZNIzotopik massa (Da )
[n 2][n 3]
Yarim hayot
[n 4][n 5]
Chirish
rejimi

[n 6]
Qizim
izotop

[n 7]
Spin va
tenglik
[n 8][n 5]
Tabiiy mo'llik (mol qismi)
Qo'zg'alish energiyasi[n 5]Oddiy nisbatTurlanish oralig'i
124Nd6064123.95223(64)#500 # ms0+
125Nd6065124.94888(43)#600 (150) milodiy5/2(+#)
126Nd6066125.94322(43)#1 # s [> 200 ns]β+126Pr0+
127Nd6067126.94050(43)#1,8 (4) sβ+127Pr5/2+#
β+, p (kamdan-kam)126Ce
128Nd6068127.93539(21)#5 # sβ+128Pr0+
β+, p (kamdan-kam)127Ce
129Nd6069128.93319(22)#4.9 (2) sβ+129Pr5/2+#
β+, p (kamdan-kam)128Ce
130Nd6070129.92851(3)21 (3) sβ+130Pr0+
131Nd6071130.92725(3)33 (3) sβ+131Pr(5/2)(+#)
β+, p (kamdan-kam)130Ce
132Nd6072131.923321(26)1,56 (10) minβ+132Pr0+
133Nd6073132.92235(5)70 (10) sβ+133Pr(7/2+)
133m1Nd127,97 (11) keV~ 70 sβ+133Pr(1/2)+
133m2Nd176.10 (10) keV~ 300 ns(9/2–)
134Nd6074133.918790(13)8,5 (15) minβ+134Pr0+
134mNd2293.1 (4) keV410 (30) s(8)–
135Nd6075134.918181(21)12.4 (6) minβ+135Pr9/2(–)
135mNd65.0 (2) keV5.5 (5) minβ+135Pr(1/2+)
136Nd6076135.914976(13)50.65 (33) minβ+136Pr0+
137Nd6077136.914567(12)38,5 (15) minβ+137Pr1/2+
137mNd519,43 (17) keV1.60 (15) sIT137Nd(11/2–)
138Nd6078137.911950(13)5,04 (9) soatβ+138Pr0+
138mNd3174,9 (4) keV410 (50) ns(10+)
139Nd6079138.911978(28)29,7 (5) minβ+139Pr3/2+
139m1Nd231.15 (5) keV5.50 (20) soatβ+ (88.2%)139Pr11/2–
IT (11,8%)139Nd
139m2Nd2570,9 + X keV-141 ns
140Nd6080139.90955(3)3.37 (2) dEC140Pr0+
140mNd2221,4 (1) keV600 (50) .s7–
141Nd6081140.909610(4)2.49 (3) soatβ+141Pr3/2+
141mNd756,51 (5) keV62.0 (8) sIT (99,95%)141Nd11/2–
β+ (.05%)141Pr
142Nd6082141.9077233(25)Barqaror0+0.272(5)0.2680–0.2730
143Nd[n 9]6083142.9098143(25)Barqaror7/2−0.122(2)0.1212–0.1232
144Nd[n 9][n 10]6084143.9100873(25)2.29(16)×1015 ya140Ce0+0.238(3)0.2379–0.2397
145Nd[n 9]6085144.9125736(25)Barqaror7/2−0.083(1)0.0823–0.0835
146Nd[n 9]6086145.9131169(25)Kuzatuv jihatidan barqaror[n 11]0+0.172(3)0.1706–0.1735
147Nd[n 9]6087146.9161004(25)10.98 (1) dβ147Pm5/2−
148Nd[n 9]6088147.916893(3)Kuzatuv jihatidan barqaror[n 12]0+0.057(1)0.0566–0.0578
149Nd[n 9]6089148.920149(3)1.728 (1) soatβ149Pm5/2−
150Nd[n 9][n 10]6090149.920891(3)6.7(7)×1018 yββ150Sm0+0.056(2)0.0553–0.0569
151Nd6091150.923829(3)12.44 (7) minβ151Pm3/2+
152Nd6092151.924682(26)11.4 (2) minβ152Pm0+
153Nd6093152.927698(29)31.6 (10) sβ153Pm(3/2)−
154Nd6094153.92948(12)25.9 (2) sβ154Pm0+
154m1Nd480 (150) # keV1.3 (5) µs
154m2Nd1349 (10) keV> 1 .s(5−)
155Nd6095154.93293(16)#8.9 (2) sβ155Pm3/2−#
156Nd6096155.93502(22)5.49 (7) sβ156Pm0+
156mNd1432 (5) keV135 ns5−
157Nd6097156.93903(21)#2 # soniya [> 300 ns]β157Pm5/2−#
158Nd6098157.94160(43)#700 # ms [> 300 ns]β158Pm0+
159Nd6099158.94609(54)#500 # msβ159Pm7/2+#
160Nd60100159.94909(64)#300 # msβ160Pm0+
161Nd60101160.95388(75)#200 # msβ161Pm1/2−#
  1. ^ mNd - hayajonlangan yadro izomeri.
  2. ^ () - noaniqlik (1σ) tegishli oxirgi raqamlardan keyin qavs ichida ixcham shaklda berilgan.
  3. ^ # - Atom massasi # bilan belgilangan: qiymat va noaniqlik faqat eksperimental ma'lumotlardan emas, balki kamida qisman Mass Surface tendentsiyalaridan kelib chiqadi (TMS ).
  4. ^ Qalin yarim umr - deyarli barqaror, yarim umr uzoqroq koinot asri.
  5. ^ a b v # - # bilan belgilangan qiymatlar faqat eksperimental ma'lumotlardan kelib chiqmaydi, lekin hech bo'lmaganda qisman qo'shni nuklidlarning tendentsiyalaridan kelib chiqadi (TNN ).
  6. ^ Parchalanish usullari:
    EC:Elektronni tortib olish
    IT:Izomerik o'tish


    p:Proton emissiyasi
  7. ^ Qalin belgi qizi sifatida - qizi mahsulot barqaror.
  8. ^ () spin qiymati - zaif tayinlash argumentlari bilan spinni bildiradi.
  9. ^ a b v d e f g h Parchalanish mahsuloti
  10. ^ a b Ibtidoiy radionuklid
  11. ^ $ Delta $ ga o'tish uchun nazariyβ yemirilish 146Sm yoki a parchalanishi 142Ce
  12. ^ $ Delta $ ga o'tish uchun nazariyβ yemirilish 148Sm yoki a parchalanishi 144Yarim umr 3,0 × 10 dan yuqori bo'lgan Ce18 yil

Adabiyotlar

  1. ^ Meyja, Yuris; va boshq. (2016). "Elementlarning atom og'irliklari 2013 (IUPAC texnik hisoboti)". Sof va amaliy kimyo. 88 (3): 265–91. doi:10.1515 / pac-2015-0305.