{{위키데이터 속성 추적}}
자연계에는 존재하는 [[루비듐]]의 동위 원소는 2종이며 <sup>85</sup>Rb와 <sup>87</sup>Rb이 존재하고 있다. 여기서 <sup>85</sup>Rb는 [[안정 동위 원소]]이며, <sup>87</sup>Rb는 [[반감기]]가 492억 3천만년의 긴 반감기를 가진 방사성 동위 원소이다.

[[루비듐]]-87은 [[스트론튬]]-87로 붕괴하며, 루비듐-스트론튬 연대 측정에 이용된다.

== 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<ref group="n">안정 동위 원소는 굵은 글씨로 표기, 우주의 나이보다 반감기가 긴 동위 원소의 반감기는 굵은 흘림체로 표기</ref>
! 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</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>71</sup>Rb
| style="text-align:right" | 37
| style="text-align:right" | 34
| 70.96532(54)#
|
| [[양성자 방출|p]]
| <sup>70</sup>Kr
| 5/2-#
|
|
|-
| <sup>72</sup>Rb
| style="text-align:right" | 37
| style="text-align:right" | 35
| 71.95908(54)#
| <1.5 µs
| p
| <sup>71</sup>Kr
| 3+#
|
|
|-
| style="text-indent:1em" | <sup>72m</sup>Rb
| colspan="3" style="text-indent:2em" | 100(100)# keV
| 1# µs
| p
| <sup>71</sup>Kr
| 1-#
|
|
|-
| <sup>73</sup>Rb
| style="text-align:right" | 37
| style="text-align:right" | 36
| 72.95056(16)#
| <30 ns
| p
| <sup>72</sup>Kr
| 3/2-#
|
|
|-
| <sup>74</sup>Rb
| style="text-align:right" | 37
| style="text-align:right" | 37
| 73.944265(4)
| 64.76(3) ms
| [[베타 붕괴|β<sup>+</sup>]]
| <sup>74</sup>Kr
| (0+)
|
|
|-
| <sup>75</sup>Rb
| style="text-align:right" | 37
| style="text-align:right" | 38
| 74.938570(8)
| 19.0(12) s
| β<sup>+</sup>
| <sup>75</sup>Kr
| (3/2-)
|
|
|-
| rowspan=2|<sup>76</sup>Rb
| rowspan=2 style="text-align:right" | 37
| rowspan=2 style="text-align:right" | 39
| rowspan=2|75.9350722(20)
| rowspan=2|36.5(6) s
| β<sup>+</sup>
| <sup>76</sup>Kr
| rowspan=2|1(-)
| rowspan=2|
| rowspan=2|
|-
| β<sup>+</sup>, [[알파 붕괴|α]] (3.8×10<sup>−7</sup>%)
| <sup>72</sup>Se
|-
| style="text-indent:1em" | <sup>76m</sup>Rb
| colspan="3" style="text-indent:2em" | 316.93(8) keV
| 3.050(7) µs
|
|
| (4+)
|
|
|-
| <sup>77</sup>Rb
| style="text-align:right" | 37
| style="text-align:right" | 40
| 76.930408(8)
| 3.77(4) min
| β<sup>+</sup>
| <sup>77</sup>Kr
| 3/2-
|
|
|-
| <sup>78</sup>Rb
| style="text-align:right" | 37
| style="text-align:right" | 41
| 77.928141(8)
| 17.66(8) min
| β<sup>+</sup>
| '''<sup>78</sup>Kr'''
| 0(+)
|
|
|-
| rowspan=2 style="text-indent:1em" | <sup>78m</sup>Rb
| rowspan=2 colspan="3" style="text-indent:2em" | 111.20(10) keV
| rowspan=2|5.74(5) min
| β<sup>+</sup> (90%)
| '''<sup>78</sup>Kr'''
| rowspan=2|4(-)
| rowspan=2|
| rowspan=2|
|-
| [[이성질핵 전이|IT]] (10%)
| <sup>78</sup>Rb
|-
| <sup>79</sup>Rb
| style="text-align:right" | 37
| style="text-align:right" | 42
| 78.923989(6)
| 22.9(5) min
| β<sup>+</sup>
| <sup>79</sup>Kr
| 5/2+
|
|
|-
| <sup>80</sup>Rb
| style="text-align:right" | 37
| style="text-align:right" | 43
| 79.922519(7)
| 33.4(7) s
| β<sup>+</sup>
| '''<sup>80</sup>Kr'''
| 1+
|
|
|-
| style="text-indent:1em" | <sup>80m</sup>Rb
| colspan="3" style="text-indent:2em" | 494.4(5) keV
| 1.6(2) µs
|
|
| 6+
|
|
|-
| <sup>81</sup>Rb
| style="text-align:right" | 37
| style="text-align:right" | 44
| 80.918996(6)
| 4.570(4) h
| β<sup>+</sup>
| <sup>81</sup>Kr
| 3/2-
|
|
|-
| rowspan=2 style="text-indent:1em" | <sup>81m</sup>Rb
| rowspan=2 colspan="3" style="text-indent:2em" | 86.31(7) keV
| rowspan=2|30.5(3) min
| IT (97.6%)
| <sup>81</sup>Rb
| rowspan=2|9/2+
| rowspan=2|
| rowspan=2|
|-
| β<sup>+</sup> (2.4%)
| <sup>81</sup>Kr
|-
| <sup>82</sup>Rb
| style="text-align:right" | 37
| style="text-align:right" | 45
| 81.9182086(30)
| 1.273(2) min
| β<sup>+</sup>
| '''<sup>82</sup>Kr'''
| 1+
|
|
|-
| rowspan=2 style="text-indent:1em" | <sup>82m</sup>Rb
| rowspan=2 colspan="3" style="text-indent:2em" | 69.0(15) keV
| rowspan=2|6.472(5) h
| β<sup>+</sup> (99.67%)
| '''<sup>82</sup>Kr'''
| rowspan=2|5-
| rowspan=2|
| rowspan=2|
|-
| IT (.33%)
| <sup>82</sup>Rb
|-
| <sup>83</sup>Rb
| style="text-align:right" | 37
| style="text-align:right" | 46
| 82.915110(6)
| 86.2(1) d
| [[전자 포획|ε]]
| '''<sup>83</sup>Kr'''
| 5/2-
|
|
|-
| style="text-indent:1em" | <sup>83m</sup>Rb
| colspan="3" style="text-indent:2em" | 42.11(4) keV
| 7.8(7) ms
| IT
| <sup>83</sup>Rb
| 9/2+
|
|
|-
| rowspan=2|<sup>84</sup>Rb
| rowspan=2 style="text-align:right" | 37
| rowspan=2 style="text-align:right" | 47
| rowspan=2|83.914385(3)
| rowspan=2|33.1(1) d
| β<sup>+</sup> (96.2%)
| '''<sup>84</sup>Kr'''
| rowspan=2|2-
| rowspan=2|
| rowspan=2|
|-
| β<sup>-</sup> (3.8%)
| '''<sup>84</sup>Sr'''
|-
| rowspan=2 style="text-indent:1em" | <sup>84m</sup>Rb
| rowspan=2 colspan="3" style="text-indent:2em" | 463.62(9) keV
| rowspan=2|20.26(4) min
| IT (>99.9%)
| <sup>84</sup>Rb
| rowspan=2|6-
| rowspan=2|
| rowspan=2|
|-
| β<sup>+</sup> (<.1%)
| '''<sup>84</sup>Kr'''
|-
| <sup>85</sup>Rb<ref group="n" name="FP">[[핵분열 생성물]]</ref>
| style="text-align:right" | 37
| style="text-align:right" | 48
| 84.911789738(12)
| colspan=3 align=center|'''안정'''
| 5/2-
| 0.7217(2)
|
|-
| rowspan=2|<sup>86</sup>Rb
| rowspan=2 style="text-align:right" | 37
| rowspan=2 style="text-align:right" | 49
| rowspan=2|85.91116742(21)
| rowspan=2|18.642(18) d
| β<sup>-</sup> (99.9948%)
| '''<sup>86</sup>Sr'''
| rowspan=2|2-
| rowspan=2|
| rowspan=2|
|-
| ε (.0052%)
| '''<sup>86</sup>Kr'''
|-
| style="text-indent:1em" | <sup>86m</sup>Rb
| colspan="3" style="text-indent:2em" | 556.05(18) keV
| 1.017(3) min
| IT
| <sup>86</sup>Rb
| 6-
|
|
|-
| <sup>87</sup>Rb<ref group="n">태양계 초창기부터 존재해 왔었던 방사성 핵자</ref><ref group="n">[[루비듐-스트론튬 연대 측정]]에 이용</ref><ref group="n" name="FP" />
| style="text-align:right" | 37
| style="text-align:right" | 50
| 86.909180527(13)
| '''4.923(22)×10<sup>10</sup> a'''
| β<sup>-</sup>
| '''<sup>87</sup>Sr'''
| 3/2-
| 0.2783(2)
|
|-
| <sup>88</sup>Rb
| style="text-align:right" | 37
| style="text-align:right" | 51
| 87.91131559(17)
| 17.773(11) min
| β<sup>-</sup>
| '''<sup>88</sup>Sr'''
| 2-
|
|
|-
| <sup>89</sup>Rb
| style="text-align:right" | 37
| style="text-align:right" | 52
| 88.912278(6)
| 15.15(12) min
| β<sup>-</sup>
| <sup>89</sup>Sr
| 3/2-
|
|
|-
| <sup>90</sup>Rb
| style="text-align:right" | 37
| style="text-align:right" | 53
| 89.914802(7)
| 158(5) s
| β<sup>-</sup>
| <sup>90</sup>Sr
| 0-
|
|
|-
| rowspan=2 style="text-indent:1em" | <sup>90m</sup>Rb
| rowspan=2 colspan="3" style="text-indent:2em" | 106.90(3) keV
| rowspan=2|258(4) s
| β<sup>-</sup> (97.4%)
| <sup>90</sup>Sr
| rowspan=2|3-
| rowspan=2|
| rowspan=2|
|-
| IT (2.6%)
| <sup>90</sup> Rb
|-
| <sup>91</sup>Rb
| style="text-align:right" | 37
| style="text-align:right" | 54
| 90.916537(9)
| 58.4(4) s
| β<sup>-</sup>
| <sup>91</sup>Sr
| 3/2(-)
|
|
|-
| rowspan=2|<sup>92</sup>Rb
| rowspan=2 style="text-align:right" | 37
| rowspan=2 style="text-align:right" | 55
| rowspan=2|91.919729(7)
| rowspan=2|4.492(20) s
| β<sup>-</sup> (99.98%)
| <sup>92</sup>Sr
| rowspan=2|0-
| rowspan=2|
| rowspan=2|
|-
| β<sup>-</sup>, [[중성자 방출|n]] (.0107%)
| <sup>91</sup>Sr
|-
| rowspan=2|<sup>93</sup>Rb
| rowspan=2 style="text-align:right" | 37
| rowspan=2 style="text-align:right" | 56
| rowspan=2|92.922042(8)
| rowspan=2|5.84(2) s
| β<sup>-</sup> (98.65%)
| <sup>93</sup>Sr
| rowspan=2|5/2-
| rowspan=2|
| rowspan=2|
|-
| β<sup>-</sup>, n (1.35%)
| <sup>92</sup>Sr
|-
| style="text-indent:1em" | <sup>93m</sup>Rb
| colspan="3" style="text-indent:2em" | 253.38(3) keV
| 57(15) µs
|
|
| (3/2-,5/2-)
|
|
|-
| rowspan=2|<sup>94</sup>Rb
| rowspan=2 style="text-align:right" | 37
| rowspan=2 style="text-align:right" | 57
| rowspan=2|93.926405(9)
| rowspan=2|2.702(5) s
| β<sup>-</sup> (89.99%)
| <sup>94</sup>Sr
| rowspan=2|3(-)
| rowspan=2|
| rowspan=2|
|-
| β<sup>-</sup>, n (10.01%)
| <sup>93</sup>Sr
|-
| rowspan=2|<sup>95</sup>Rb
| rowspan=2 style="text-align:right" | 37
| rowspan=2 style="text-align:right" | 58
| rowspan=2|94.929303(23)
| rowspan=2|377.5(8) ms
| β<sup>-</sup> (91.27%)
| <sup>95</sup>Sr
| rowspan=2|5/2-
| rowspan=2|
| rowspan=2|
|-
| β<sup>-</sup>, n (8.73%)
| <sup>94</sup>Sr
|-
| rowspan=2|<sup>96</sup>Rb
| rowspan=2 style="text-align:right" | 37
| rowspan=2 style="text-align:right" | 59
| rowspan=2|95.93427(3)
| rowspan=2|202.8(33) ms
| β<sup>-</sup> (86.6%)
| <sup>96</sup>Sr
| rowspan=2|2+
| rowspan=2|
| rowspan=2|
|-
| β<sup>-</sup>, n (13.4%)
| <sup>95</sup>Sr
|-
| rowspan=3 style="text-indent:1em" | <sup>96m</sup>Rb
| rowspan=3 colspan="3" style="text-indent:2em" | 0(200)# keV
| rowspan=3|200# ms [>1 ms]
| β<sup>-</sup>
| <sup>96</sup>Sr
| rowspan=3|1(-#)
| rowspan=3|
| rowspan=3|
|-
| IT
| <sup>96</sup>Rb
|-
| β<sup>-</sup>, n
| <sup>95</sup>Sr
|-
| rowspan=2|<sup>97</sup>Rb
| rowspan=2 style="text-align:right" | 37
| rowspan=2 style="text-align:right" | 60
| rowspan=2|96.93735(3)
| rowspan=2|169.9(7) ms
| β<sup>-</sup> (74.3%)
| <sup>97</sup>Sr
| rowspan=2|3/2+
| rowspan=2|
| rowspan=2|
|-
| β<sup>-</sup>, n (25.7%)
| <sup>96</sup>Sr
|-
| rowspan=3|<sup>98</sup>Rb
| rowspan=3 style="text-align:right" | 37
| rowspan=3 style="text-align:right" | 61
| rowspan=3|97.94179(5)
| rowspan=3|114(5) ms
| β<sup>-</sup>(86.14%)
| <sup>98</sup>Sr
| rowspan=3|(0,1)(-#)
| rowspan=3|
| rowspan=3|
|-
| β<sup>-</sup>, n (13.8%)
| <sup>97</sup>Sr
|-
| β<sup>-</sup>, 2n (.051%)
| <sup>96</sup>Sr
|-
| style="text-indent:1em" | <sup>98m</sup>Rb
| colspan="3" style="text-indent:2em" | 290(130) keV
| 96(3) ms
| β<sup>-</sup>
| <sup>97</sup>Sr
| (3,4)(+#)
|
|
|-
| rowspan=2|<sup>99</sup>Rb
| rowspan=2 style="text-align:right" | 37
| rowspan=2 style="text-align:right" | 62
| rowspan=2|98.94538(13)
| rowspan=2|50.3(7) ms
| β<sup>-</sup> (84.1%)
| <sup>99</sup>Sr
| rowspan=2|(5/2+)
| rowspan=2|
| rowspan=2|
|-
| β<sup>-</sup>, n (15.9%)
| <sup>98</sup>Sr
|-
| rowspan=3|<sup>100</sup>Rb
| rowspan=3 style="text-align:right" | 37
| rowspan=3 style="text-align:right" | 63
| rowspan=3|99.94987(32)#
| rowspan=3|51(8) ms
| β<sup>-</sup> (94.25%)
| <sup>100</sup>Sr
| rowspan=3|(3+)
| rowspan=3|
| rowspan=3|
|-
| β<sup>-</sup>, n (5.6%)
| <sup>99</sup>Sr
|-
| β<sup>-</sup>, 2n (.15%)
| <sup>98</sup>Sr
|-
| rowspan=2|<sup>101</sup>Rb
| rowspan=2 style="text-align:right" | 37
| rowspan=2 style="text-align:right" | 64
| rowspan=2|100.95320(18)
| rowspan=2|32(5) ms
| β<sup>-</sup> (69%)
| <sup>101</sup>Sr
| rowspan=2|(3/2+)#
| rowspan=2|
| rowspan=2|
|-
| β<sup>-</sup>, n (31%)
| <sup>100</sup>Sr
|-
| rowspan=2|<sup>102</sup>Rb
| rowspan=2 style="text-align:right" | 37
| rowspan=2 style="text-align:right" | 65
| rowspan=2|101.95887(54)#
| rowspan=2|37(5) ms
| β<sup>-</sup> (82%)
| <sup>102</sup>Sr
| rowspan=2|
| rowspan=2|
| rowspan=2|
|-
| β<sup>-</sup>, n (18%)
| <sup>101</sup>Sr
|}
{{각주|group="n"}}

== 각주 ==
{{각주}}

{{동위 원소 색인}}

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