Jessica Rehak
@jessica-rehak.bsky.social
Nuclear physicist, bay area resident, veteran. PhD UC Berkeley. Opinions my own, unless they're bad. No, even then I suppose.
on one hand I can reduce my data, on the OTHER hand maybe I can train a fruit fly brain to reduce my data 🧪
September 16, 2026 at 10:19 PM
on one hand I can reduce my data, on the OTHER hand maybe I can train a fruit fly brain to reduce my data 🧪
To look for element 120 we're building a Californium target, which is way too hot to handle. Check out how Rohan is using a robot to assemble our radioactive pizza here. 🍕🧪
Mission briefing! 🚨 We're building a super radioactive target to make the new element E120, and we need a hero! Introducing DRAGONS, the robot Rohan is training for the job. Watch the discovery unfold! 💪💥🧪
#Robots #MakingScienceHappen #NewElements #NuclearScience #PeriodicTable
#Robots #MakingScienceHappen #NewElements #NuclearScience #PeriodicTable
September 14, 2026 at 5:29 PM
To look for element 120 we're building a Californium target, which is way too hot to handle. Check out how Rohan is using a robot to assemble our radioactive pizza here. 🍕🧪
Reposted by Jessica Rehak
Mission briefing! 🚨 We're building a super radioactive target to make the new element E120, and we need a hero! Introducing DRAGONS, the robot Rohan is training for the job. Watch the discovery unfold! 💪💥🧪
#Robots #MakingScienceHappen #NewElements #NuclearScience #PeriodicTable
#Robots #MakingScienceHappen #NewElements #NuclearScience #PeriodicTable
September 14, 2026 at 4:50 PM
Mission briefing! 🚨 We're building a super radioactive target to make the new element E120, and we need a hero! Introducing DRAGONS, the robot Rohan is training for the job. Watch the discovery unfold! 💪💥🧪
#Robots #MakingScienceHappen #NewElements #NuclearScience #PeriodicTable
#Robots #MakingScienceHappen #NewElements #NuclearScience #PeriodicTable
Neutrinoless double beta decay
September 11, 2026 at 4:47 PM
Neutrinoless double beta decay
Little Red Dots (LRDs) are my favorite "silly little phrase that became a Science Term ™️" since the Big Bang
A new paper that I'm excited to be a part of: Little Red Dots (LRDs) at high redshift have very specific chemical signatures of high-temperature hydrogen burning generally only seen in nearby globular clusters (GCs). This may indicate GCs and LRDs are connected and both hosted supermassive stars! 🧪
September 11, 2026 at 3:30 PM
Little Red Dots (LRDs) are my favorite "silly little phrase that became a Science Term ™️" since the Big Bang
One of the things I love about working at @berkeleylab.lbl.gov is that if I'm ever feeling young and spry I can walk to work through campus and then I feel accurately old and tired
September 11, 2026 at 2:52 PM
One of the things I love about working at @berkeleylab.lbl.gov is that if I'm ever feeling young and spry I can walk to work through campus and then I feel accurately old and tired
Gas car: vroom vroom
Electric car: *spooky angel choir*
Electric car: *spooky angel choir*
September 11, 2026 at 2:00 PM
Gas car: vroom vroom
Electric car: *spooky angel choir*
Electric car: *spooky angel choir*
please just tell me what this bolt is made of why was it all scanned in such low resolution 🧪
September 10, 2026 at 9:09 PM
please just tell me what this bolt is made of why was it all scanned in such low resolution 🧪
"Physicists don't understand" means they just don't know how to make it a harmonic oscillator yet 🧪
August 18, 2026 at 2:00 PM
"Physicists don't understand" means they just don't know how to make it a harmonic oscillator yet 🧪
Reposted by Jessica Rehak
A particle made of force?
Chinese researchers claim they've definitively detected a "glueball"--a particle of bound gluons, which carry the strong force. Gluons bind together protons & neutrons, but they can also stick to each other. No ordinary matter required. 🧪
www.science.org/content/arti...
Chinese researchers claim they've definitively detected a "glueball"--a particle of bound gluons, which carry the strong force. Gluons bind together protons & neutrons, but they can also stick to each other. No ordinary matter required. 🧪
www.science.org/content/arti...
August 13, 2026 at 5:18 PM
A particle made of force?
Chinese researchers claim they've definitively detected a "glueball"--a particle of bound gluons, which carry the strong force. Gluons bind together protons & neutrons, but they can also stick to each other. No ordinary matter required. 🧪
www.science.org/content/arti...
Chinese researchers claim they've definitively detected a "glueball"--a particle of bound gluons, which carry the strong force. Gluons bind together protons & neutrons, but they can also stick to each other. No ordinary matter required. 🧪
www.science.org/content/arti...
Why would they build a cyclotron way up on a hill?!
Oh ok nevermind I get it. 🧪
Oh ok nevermind I get it. 🧪
August 13, 2026 at 4:15 PM
Why would they build a cyclotron way up on a hill?!
Oh ok nevermind I get it. 🧪
Oh ok nevermind I get it. 🧪
LBNL Nuclear Science Division is looking for a new director! jobs.lbl.gov/jobs/nuclear... 🧪
Nuclear Science Division Director in Bay Area, California, United States
Lawrence Berkeley National Laboratory is seeking a dynamic scientific leader with an international reputation and outstanding record of scientific...
jobs.lbl.gov
August 7, 2026 at 4:34 PM
LBNL Nuclear Science Division is looking for a new director! jobs.lbl.gov/jobs/nuclear... 🧪
I'm convinced GRETA is the most satisfying arrangement of germanium detectors humanity has created. It was very not-satisfying to help run the cables for them though. 🧪
The Gamma-Ray Energy Tracking Array (GRETA) has successfully completed its commissioning run at FRIB! 🔬 Led by Berkeley Lab, the world's most advanced gamma-ray spectrometer is ready to reveal the inner workings of atomic nuclei.
Read more: nuclearscience.lbl.gov/2026/07/28/g... #NuclearPhysics
Read more: nuclearscience.lbl.gov/2026/07/28/g... #NuclearPhysics
July 30, 2026 at 7:34 PM
I'm convinced GRETA is the most satisfying arrangement of germanium detectors humanity has created. It was very not-satisfying to help run the cables for them though. 🧪
The lab decided "PEP" is the best term for our yearly goal setting because I guess they don't have the trauma of being in the startup/tech sector.
July 27, 2026 at 11:32 PM
The lab decided "PEP" is the best term for our yearly goal setting because I guess they don't have the trauma of being in the startup/tech sector.
Using a dagger superscript because I’m feeling scientifically edgy
July 17, 2026 at 2:40 PM
Using a dagger superscript because I’m feeling scientifically edgy
If they made Back to the Future today, Marty would travel back to the 90s in a Cybertruck.
July 12, 2026 at 11:47 PM
If they made Back to the Future today, Marty would travel back to the 90s in a Cybertruck.
When scientists identify that a published paper may be wrong, that is science succeeding not failing. Peer review is helpful but imperfect.
July 9, 2026 at 11:12 PM
When scientists identify that a published paper may be wrong, that is science succeeding not failing. Peer review is helpful but imperfect.
If you’re ever wondered what $200k of Calcium-48 looks like. Sadly it's not mine it belongs to @lbnlnuclearsci.bsky.social 🧪
July 9, 2026 at 8:49 PM
If you’re ever wondered what $200k of Calcium-48 looks like. Sadly it's not mine it belongs to @lbnlnuclearsci.bsky.social 🧪
The 88-inch Cyclotron at LBNL is still looking good after 65 years. @lbnlnuclearsci.bsky.social 🧪
July 9, 2026 at 2:25 PM
The 88-inch Cyclotron at LBNL is still looking good after 65 years. @lbnlnuclearsci.bsky.social 🧪
Due to the normal slightly-buggy kid-remembering of names, my daughter calls this guy General Gordon
July 8, 2026 at 9:35 PM
Due to the normal slightly-buggy kid-remembering of names, my daughter calls this guy General Gordon
Reposted by Jessica Rehak
Jennifer Pore from NSD’s Low Energy Nuclear Physics Program is carrying forward @BerkeleyLab legacy of reshaping the periodic table. Using the 88-Inch Cyclotron, the group is continuing the historic path blazed by Glenn Seaborg.
nuclearscience.lbl.gov/2026/05/01/c...
nuclearscience.lbl.gov/2026/05/01/c...
Can the 88-Inch Cyclotron Save the Periodic Table? – Nuclear Science Division
The modern periodic table creates the illusion that chemistry is a solved puzzle. With every row and column of the table filled — either by atoms studied for centuries or man-made ones observed only…
nuclearscience.lbl.gov
July 7, 2026 at 4:49 PM
Jennifer Pore from NSD’s Low Energy Nuclear Physics Program is carrying forward @BerkeleyLab legacy of reshaping the periodic table. Using the 88-Inch Cyclotron, the group is continuing the historic path blazed by Glenn Seaborg.
nuclearscience.lbl.gov/2026/05/01/c...
nuclearscience.lbl.gov/2026/05/01/c...
These old radiation symbols with a slight tilt have a casual vibe that modern ones are missing
June 30, 2026 at 10:10 PM
These old radiation symbols with a slight tilt have a casual vibe that modern ones are missing
I need someone who studies penguins to tell me: if an average fit person is placed on the Antarctic ice in appropriate clothing 10m away from an Emperor penguin, could they catch the penguin?
June 22, 2026 at 2:23 PM
I need someone who studies penguins to tell me: if an average fit person is placed on the Antarctic ice in appropriate clothing 10m away from an Emperor penguin, could they catch the penguin?
I watched Episode 1 with my kids and the number of memes they included just feels like fan service
June 19, 2026 at 2:25 PM
I watched Episode 1 with my kids and the number of memes they included just feels like fan service
“Reclaiming my sheets”
June 15, 2026 at 1:52 PM
“Reclaiming my sheets”