Understanding The Nuclear Force
Clare Boothe Luce Lecturer Studies Nuclear Fusion:
‘One of the Fundamental Forces in Nature’
Date Published: Oct. 5, 2017
The sun has been producing light for nearly five billion years, but where does its
energy come from? As the mathematician and astronomer Nicolaus Copernicus first suggested,
the sun rules the center of our solar system with a gravitational iron fist. Scientists
since Copernicus have discovered that nuclear reactions in the sun’s core generate
energy to produce the light we see; those same reactions enable the production of
elements in our universe that are heavier than hydrogen.
Studying the core of this natural phenomenon is Sherry Yennello, professor of chemistry,
nuclear science chair and director of the Cyclotron Institute at Texas A&M University,
one of the leading university acceleratory laboratories in the United States. “I’m
looking forward to my visit to the University of Dallas next week,” said Yennello,
who will join us on Tuesday, Oct. 10, for the annual Clare Boothe Luce Lecture Series at 5 p.m. in the SB Hall Serafy Special Events Room
“I hope that through my Clare Boothe Lecture, I can inspire some of the students at
UD to wonder a bit why the world works as it does, and how they could play a part
in exploring the frontiers of knowledge,” she continued.
“This is our fifth Clare Boothe Luce Lecture in the last three years,” said Professor
of Physics and Department Chairwoman Sally Hicks. “Dr. Yennello is presenting just
a piece of an important puzzle; she studies these reactions in a lab and helps us
understand the formation of certain nuclei in stars. In doing this, we are able to
develop a better understanding of one of the fundamental forces in nature — the nuclear
“Life would not be possible without nuclear reactions,” said Yennello. “The sun is
a big ball of nuclear reactions. All of the elements that make up the molecules of
cells in our bodies were formed by nuclear reactions.”
Nuclear reactions, though, occur at times and scales that pose unique challenges to
scientists. “On Earth, our best means of studying these stellar processes is in an
accelerator laboratory,” explained Hicks. “Accelerators are used to give energy to
particles and collide them with other particles. The temperatures and pressures involved
are as close to stellar environments as we can have on Earth.”
The sun accounts for 99.8 percent of all mass in our entire solar system. Ninety-three million miles from Earth, inside the sun’s core, hydrogen atoms are fused together under crushing pressure
and extreme temperatures to create helium. This fusion process converts mass into
energy, which scientists measure using Albert Einstein's Theory of Relativity (E=MC2).
“If you want to be amazed by nature in any way, then understanding nucleosynthesis
is one of those things that is just downright awe-inspiring,” said Hicks. “Also, if
you talk to any UD student who has had a Research Experience for Undergraduates (REU)
at Texas A&M, you’ll find them singing praises of Dr. Yennello.”
In the past few years, several UD undergraduates have participated in the Cyclotron
Institute summer research program, in conjunction with the National Science Foundation,
at Texas A&M. The program groups together 10 students with 10 research advisers who
also serve as faculty at the university. This past summer, senior Matthew Nickel,
BS ’18 (physics and math), was one of these students, taking part in the Cyclotron
Institute REU to help fulfill his undergraduate research requirement at UD. His group’s
research was titled "Event-by-Event Simulations of Early Gluon Fields in High Energy
Nickel first met Yennello last year at the Conference on Application of Accelerators in Research and Industry (CAARI) in Fort Worth. "Dr. Yennello has retained a curiosity and joy of learning that began with
her interest in science. The fact that she retained those traits throughout her career
is something I hope to be true of me too," he said.
“The Cyclotron Institute REU was a wonderful opportunity that steered me toward my
present career in particle physics,” said Will Flanagan, assistant professor of physics
at UD and another alumnus of the research program. After participating in the Cyclotron
Institute REU in the summer of 2008, Flanagan became fascinated with the connection
between cosmology and particle physics. “The Texas A&M Cyclotron, which Dr. Yennello
directs, does meaningful research on everything from simulating nuclear production
in exploding stars to making sure satellites function properly in space.”
“Dr. Yennello loves physics and students, and she has an enthusiasm for her research
that always makes me excited to hear her speak,” said Hicks.
Have more questions after the lecture? Join Yennello on Wednesday, Oct. 11, from 7:30-9
a.m., for an open breakfast Q&A in the Haggar Cafe.
Part of the Clare Boothe Luce Program at UD, this lecture series invites successful female scientists, engineers and mathematicians
to campus each semester to deliver a lecture on their research.
RSVP to attend. Seating is limited.