{{위키데이터 속성 추적}}
자연계에 존재하는 [[크립톤]]의 [[안정 동위 원소]]는 5종으로 <sup>80</sup>Kr, <sup>82</sup>Kr, <sup>83</sup>Kr, <sup>84</sup>Kr <sup>86</sup>Kr이 존재한다. 
이들 중 <sup>84</sup>Kr은 56.987%로 자연계에서 가장 많이 존재한다.

인공적으로 합성된 크립톤의 동위 원소로는 <sup>69</sup>Kr에서 <sup>101</sup>Kr까지 있으며, 이들 중 <sup>85</sup>Kr은 [[반감기]]가 10.776년으로 [[우라늄]]과 [[토륨]]의 [[자발 핵분열]]로 생성되어 자연계에 미량 존재하며, [[원자로]]의 핵분열로도 많이 생성된다.
<sup>81</sup>Kr은 반감기가 22만 9천년이며, 우주선 생성 동위 원소로 자연계에 미량 존재한다.

== 표 ==
{| class="wikitable" style="font-size:95%; white-space:nowrap"
! rowspan="2" | 핵자<br />수
! Z([[양성자|p]])
! N([[중성자|n]])
! &nbsp;<br />동위 원소 질량 (u)<br />&nbsp;
! rowspan="2" | 반감기
! rowspan="2" | 붕괴<br />방식<ref>http://www.nucleonica.net/unc.aspx</ref><ref group="n">약어:<br />IT: [[이성질핵 전이]]</ref>
! rowspan="2" | 붕괴 생성<br />동위 원소<ref group="n">안정 동위 원소는 굵은 글씨로 표기, 우주의 나이보다 반감기가 긴 동위 원소의 반감기는 굵은 흘림체로 표기</ref>
! rowspan="2" | 핵<br />스핀
! rowspan="2" | 자연계에 존재하는<br />동위 원소<br />범위<br />(몰 분율)
! rowspan="2" | 자연계에 존재하는<br />최대 범위<br />(몰 분율)
|-
! colspan="3" | 들뜬 에너지
|-
| <sup>69</sup>Kr
| style="text-align:right" | 36
| style="text-align:right" | 33
| 68.96518(43)#
| 32(10) ms
| [[베타 붕괴|β<sup>+</sup>]]
| <sup>69</sup>Br
| 5/2-#
|
|
|-
| <sup>70</sup>Kr
| style="text-align:right" | 36
| style="text-align:right" | 34
| 69.95526(41)#
| 52(17) ms
| β<sup>+</sup>
| <sup>70</sup>Br
| 0+
|
|
|-
| rowspan=2|<sup>71</sup>Kr
| rowspan=2 style="text-align:right" | 36
| rowspan=2 style="text-align:right" | 35
| rowspan=2|70.94963(70)
| rowspan=2|100(3) ms
| β<sup>+</sup> (94.8%)
| <sup>71</sup>Br
| rowspan=2|(5/2)-
| rowspan=2|
| rowspan=2|
|-
| β<sup>+</sup>, [[양성자 방출|p]] (5.2%)
| <sup>70</sup>Se
|-
| <sup>72</sup>Kr
| style="text-align:right" | 36
| style="text-align:right" | 36
| 71.942092(9)
| 17.16(18) s
| β<sup>+</sup>
| <sup>72</sup>Br
| 0+
|
|
|-
| rowspan=2|<sup>73</sup>Kr
| rowspan=2 style="text-align:right" | 36
| rowspan=2 style="text-align:right" | 37
| rowspan=2|72.939289(7)
| rowspan=2|28.6(6) s
| β<sup>+</sup> (99.32%)
| <sup>73</sup>Br
| rowspan=2|3/2-
| rowspan=2|
| rowspan=2|
|-
| β<sup>+</sup>, p (.68%)
| <sup>72</sup>Se
|-
| style="text-indent:1em" | <sup>73m</sup>Kr
| colspan="3" style="text-indent:2em" | 433.66(12) keV
| 107(10) ns
|
|
| (9/2+)
|
|
|-
| <sup>74</sup>Kr
| style="text-align:right" | 36
| style="text-align:right" | 38
| 73.9330844(22)
| 11.50(11) min
| β<sup>+</sup>
| <sup>74</sup>Br
| 0+
|
|
|-
| <sup>75</sup>Kr
| style="text-align:right" | 36
| style="text-align:right" | 39
| 74.930946(9)
| 4.29(17) min
| β<sup>+</sup>
| <sup>75</sup>Br
| 5/2+
|
|
|-
| <sup>76</sup>Kr
| style="text-align:right" | 36
| style="text-align:right" | 40
| 75.925910(4)
| 14.8(1) h
| β<sup>+</sup>
| <sup>76</sup>Br
| 0+
|
|
|-
| <sup>77</sup>Kr
| style="text-align:right" | 36
| style="text-align:right" | 41
| 76.9246700(21)
| 74.4(6) min
| β<sup>+</sup>
| <sup>77</sup>Br
| 5/2+
|
|
|-
| <sup>78</sup>Kr
| style="text-align:right" | 36
| style="text-align:right" | 42
| 77.9203648(12)
| 1.04 {{e|22}} y
| β<sup>+</sup>β<sup>+</sup>
| 0.00355(3)
|
|-
| <sup>79</sup>Kr
| style="text-align:right" | 36
| style="text-align:right" | 43
| 78.920082(4)
| 35.04(10) h
| β<sup>+</sup>
| '''<sup>79</sup>Br'''
| 1/2-
|
|
|-
| style="text-indent:1em" | <sup>79m</sup>Kr
| colspan="3" style="text-indent:2em" | 129.77(5) keV
| 50(3) s
|
|
| 7/2+
|
|
|-
| <sup>80</sup>Kr
| style="text-align:right" | 36
| style="text-align:right" | 44
| 79.9163790(16)
| colspan=3 align=center|'''안정'''
| 0+
| 0.02286(10)
|
|-
| <sup>81</sup>Kr
| style="text-align:right" | 36
| style="text-align:right" | 45
| 80.9165920(21)
| 2.29(11)×10<sup>5</sup> a
| [[전자 포획|ε]]
| '''<sup>81</sup>Br'''
| 7/2+
|
|
|-
| rowspan=2 style="text-indent:1em" | <sup>81m</sup>Kr
| rowspan=2 colspan="3" style="text-indent:2em" | 190.62(4) keV
| rowspan=2|13.10(3) s
| [[이성질핵 전이|IT]] (99.975%)
| <sup>81</sup>Kr
| rowspan=2|1/2-
| rowspan=2|
| rowspan=2|
|-
| EC (.025%)
| '''<sup>81</sup>Br'''
|-
| <sup>82</sup>Kr
| style="text-align:right" | 36
| style="text-align:right" | 46
| 81.9134836(19)
| colspan=3 align=center|'''안정'''
| 0+
| 0.11593(31)
|
|-
| <sup>83</sup>Kr<ref group="n" name="FP">[[핵분열 생성물]]</ref>
| style="text-align:right" | 36
| style="text-align:right" | 47
| 82.914136(3)
| colspan=3 align=center|'''안정'''
| 9/2+
| 0.11500(19)
|
|-
| style="text-indent:1em" | <sup>83m1</sup>Kr
| colspan="3" style="text-indent:2em" | 9.4053(8) keV
| 154.4(11) ns
| 7/2+
|
|
|-
| style="text-indent:1em" | <sup>83m2</sup>Kr
| colspan="3" style="text-indent:2em" | 41.5569(10) keV
| 1.83(2) h
| IT
| '''<sup>83</sup>Kr'''
| 1/2-
|
|
|-
| <sup>84</sup>Kr<ref group="n" name="FP" />
| style="text-align:right" | 36
| style="text-align:right" | 48
| 83.911507(3)
| colspan=3 align=center|'''안정'''
| 0+
| 0.56987(15)
|
|-
| style="text-indent:1em" | <sup>84m</sup>Kr
| colspan="3" style="text-indent:2em" | 3236.02(18) keV
| 1.89(4) µs
|
|
| 8+
|
|
|-
| <sup>85</sup>Kr<ref group="n" name="FP" />
| style="text-align:right" | 36
| style="text-align:right" | 49
| 84.9125273(21)
| 10.776(3) a
| β<sup>-</sup>
| '''<sup>85</sup>Rb'''
| 9/2+
|
|
|-
| rowspan=2 style="text-indent:1em" | <sup>85m1</sup>Kr
| rowspan=2 colspan="3" style="text-indent:2em" | 304.871(20) keV
| rowspan=2|4.480(8) h
| β<sup>-</sup> (78.6%)
| '''<sup>85</sup>Rb'''
| rowspan=2|1/2-
| rowspan=2|
| rowspan=2|
|-
| IT (21.4%)
| <sup>85</sup>Kr
|-
| style="text-indent:1em" | <sup>85m2</sup>Kr
| colspan="3" style="text-indent:2em" | 1991.8(13) keV
| 1.6(7) µs<br />[1.2(+10-4) µs]
|
|
| (17/2+)
|
|
|-
| <sup>86</sup>Kr<ref group="n" name="FP" />
| style="text-align:right" | 36
| style="text-align:right" | 50
| 85.91061073(11)
| colspan=3 align=center|'''안정'''<ref group="n">β<sup>-</sup>β<sup>-</sup> 붕괴를 통해 '''<sup>86</sup>Sr'''으로 붕괴할 수 있다.</ref>
| 0+
| 0.17279(41)
|
|-
| <sup>87</sup>Kr
| style="text-align:right" | 36
| style="text-align:right" | 51
| 86.91335486(29)
| 76.3(5) min
| β<sup>-</sup>
| '''''<sup>87</sup>Rb'''''
| 5/2+
|
|
|-
| <sup>88</sup>Kr
| style="text-align:right" | 36
| style="text-align:right" | 52
| 87.914447(14)
| 2.84(3) h
| β<sup>-</sup>
| <sup>88</sup>Rb
| 0+
|
|
|-
| <sup>89</sup>Kr
| style="text-align:right" | 36
| style="text-align:right" | 53
| 88.91763(6)
| 3.15(4) min
| β<sup>-</sup>
| <sup>89</sup>Rb
| 3/2(+#)
|
|
|-
| <sup>90</sup>Kr
| style="text-align:right" | 36
| style="text-align:right" | 54
| 89.919517(20)
| 32.32(9) s
| β<sup>-</sup>
| <sup>90m</sup>Rb
| 0+
|
|
|-
| <sup>91</sup>Kr
| style="text-align:right" | 36
| style="text-align:right" | 55
| 90.92345(6)
| 8.57(4) s
| β<sup>-</sup>
| <sup>91</sup>Rb
| 5/2(+)
|
|
|-
| rowspan=2|<sup>92</sup>Kr
| rowspan=2 style="text-align:right" | 36
| rowspan=2 style="text-align:right" | 56
| rowspan=2|91.926156(13)
| rowspan=2|1.840(8) s
| β<sup>-</sup> (99.96%)
| <sup>92</sup>Rb
| rowspan=2|0+
| rowspan=2|
| rowspan=2|
|-
| β<sup>-</sup>, [[중성자 방출|n]] (.033%)
| <sup>91</sup>Rb
|-
| rowspan=2|<sup>93</sup>Kr
| rowspan=2 style="text-align:right" | 36
| rowspan=2 style="text-align:right" | 57
| rowspan=2|92.93127(11)
| rowspan=2|1.286(10) s
| β<sup>-</sup> (98.05%)
| <sup>93</sup>Rb
| rowspan=2|1/2+
| rowspan=2|
| rowspan=2|
|-
| β<sup>-</sup>, n (1.95%)
| <sup>92</sup>Rb
|-
| rowspan=2|<sup>94</sup>Kr
| rowspan=2 style="text-align:right" | 36
| rowspan=2 style="text-align:right" | 58
| rowspan=2|93.93436(32)#
| rowspan=2|210(4) ms
| β<sup>-</sup> (94.3%)
| <sup>94</sup>Rb
| rowspan=2|0+
| rowspan=2|
| rowspan=2|
|-
| β<sup>-</sup>, n (5.7%)
| <sup>93</sup>Rb
|-
| <sup>95</sup>Kr
| style="text-align:right" | 36
| style="text-align:right" | 59
| 94.93984(43)#
| 114(3) ms
| β<sup>-</sup>
| <sup>95</sup>Rb
| 1/2(+)
|
|
|-
| <sup>96</sup>Kr
| style="text-align:right" | 36
| style="text-align:right" | 60
| 95.94307(54)#
| 80(7) ms
| β<sup>-</sup>
| <sup>96</sup>Rb
| 0+
|
|
|-
| rowspan=2|<sup>97</sup>Kr
| rowspan=2 style="text-align:right" | 36
| rowspan=2 style="text-align:right" | 61
| rowspan=2|96.94856(54)#
| rowspan=2|63(4) ms
| β<sup>-</sup>
| <sup>97</sup>Rb
| rowspan=2|3/2+#
| rowspan=2|
| rowspan=2|
|-
| β<sup>-</sup>, n
| <sup>96</sup>Rb
|-
| <sup>98</sup>Kr
| style="text-align:right" | 36
| style="text-align:right" | 62
| 97.95191(64)#
| 46(8) ms
|
|
| 0+
|
|
|-
| <sup>99</sup>Kr
| style="text-align:right" | 36
| style="text-align:right" | 63
| 98.95760(64)#
| 40(11) ms
|
|
| (3/2+)#
|
|
|-
| <sup>100</sup>Kr
| style="text-align:right" | 36
| style="text-align:right" | 64
| 99.96114(54)#
| 10# ms<br />[>300 ns]
|
|
| 0+
|
|
|-
| <sup>101</sup>Kr
| 36
| 65
| unknown
| >635 ns
| β<sup>-</sup> 2n, β<sup>-</sup> n, β<sup>-</sup>
| <sup>99</sup>Rb, <sup>100</sup>Rb, <sup>101</sup>Rb<ref group="n">옆 칸의 붕괴 방식 순서이다.</ref>
| unknown
|
| 
|}
<references group="n" />

== 각주 ==
<references/>

{{동위 원소 색인}}

{{전거 통제}}

[[분류:크립톤|동위 원소]]
[[분류:크립톤 동위 원소| ]]
[[분류:원소별 동위 원소 목록]]